The Complete Guide to Effective Reading
Learning is a heavily misunderstood concept.
As a paradigm example of deep work, we understand that, when reading, directing your full attention to the material at hand is essential. Grasping complex information is hard.
But this is only half the battle.
After some string of words hits your retina and has made its way to your brain, you’re not done.
In a cruel irony, these hours of deep work often cause flow states and the feeling that ‘you’ve had a good day’ and learned a shitload of new stuff.
But for many reading episodes this feeling is deceptive. There is an ineliminable aspect to learning that takes place after the glorious flow state.
The other half of the battle is to transfer the newly acquired intelligence from your working memory to your long-term understanding and integrate it into your standing stack of mental models.
If you don’t facilitate this, your learning gains are only a fraction of what they could have been.
In this article, I’m going to breakdown how to win the battle and the war — how to avoid these traps and organize your reading habit for a maximal Return On Investment (ROI) on reading hours.
This is what we’ll cover:
Warning: this is a very nerdy post.
Meta-learning is knowing how to learn. It is one of the most important skills to learn, yet few people know how to do to it.
Reading and writing is what I do for a living, and, interestingly, a lot of non-imaginary friends have been asking me how I learn. This is special, because most of the times when people don’t know how to do something, they go to great lengths not to notice their deficiency.
Could it be that many students turned ‘knowledge workers’ have the nagging feeling that something is missing in their skillset because they were never taught meta-learning?
This is not their fault, but a lack in our education system.
As Adam Robinson observed on the Farnam Street podcast:
This is weird, because, in today’s high-information world, people need the ability to make sense of complexity and to combine many bits of data into a broad picture of the world.
Merely acquiring information is not (yet) learning.
Learning itself is a skill, and knowing how to do it well is an incredibly valuable advantage.
We take this is for granted, but how to do this is far from obvious and doesn’t get taught in the curriculum.
So, how do we learn?
Before we attempt to answer the question, let’s get clear on what a satisfactory answer needs to get us. What does it mean to learn? When have you learned something?
In the introduction, I stated that just studying the information isn’t enough (no matter how intense your focus was). Learning has two phases — not one.
A lot has been said about the first phase — about deep work, concentration, blocking out distractions, and so forth. This makes sense: if you’re checking Facebook all the time, your mind is not ‘there’, and you might as well not have spent your afternoon ’reading’ this book.
This is all great and I‘m a big fan, but in the meantime, we’re ignoring step two.
If you don’t spend time revisiting and grappling with the book either, the same applies — you might as well not have read it. In the long run, there is no difference between skipping the first or the second stage (except whether you passed that French test in high school back in 2019…).
After you’ve killed Cersei, you’ve still got the White Walkers to deal with. If you don’t, you lose either way.
That is why students who binge-study the night before the exam quite literally forget everything two days later: while all these lame French words were still in their short-term memory, allowing them to pass the test, the information never transitioned to their long-term understanding — and so, sooner or later, it evaporated.
To learn, you need to transfer the newly acquired intelligence from your working memory to your long-term understanding.
The jump from short-term memory to long-term understanding doesn’t happen automatically. The default mode, after you close your books for the day, is not retainment but forgetting.
This learning guide is not about how to do generic deep work. It explains how to maximize the ROI on hours spent reading, assuming you did them ‘deep work style’.
First, I need to discuss a common objection that denies phase two of learning matters. If you have no quibble with memorization, and doing the required effort, you can skip this section.
“But Mr. Maarten,” the protest goes, “you mention ‘processing’ and ‘remembering’ into my ‘long-term understanding’, but isn’t memorizing pointless? My Google Assistant can look everything up and also is smarter than me, says my Google Assistant.”
Indeed, Albert Einstein is supposed to have said: “Never memorize what you can look up in a book”. In Einstein’s days, books were unequaled as a source of information. We, on the other hand, live in an age where nearly everything can be accessed through the magic vehicle of internet. Following Einstein’s logic, then, nothing is worth memorizing anymore, because everything can be looked up.
But, of course, that is probably not what old Albert was getting at.
Most likely, the advice he wanted to dispense was that you should not waste your time by committing unimportant details to memory. Rather, your focus should be on understanding the bigger picture — on how things relate to each other.
This reminds me of Elon Musk’s approach to learning. He recommends viewing knowledge as a tree:
To ‘learn’, we need to do more than merely feeding ourselves new information. Expanding our intelligence requires connecting new materials to what we already knew (the second phase of learning). That, in turn, requires something to connect to.
There’s no adding branches without a solid trunk.
The very possibility of genuine insight requires a memorized base. Without it, data you consume will not be added to your tree of knowledge. Instead, they will float in the air for a couple of weeks or so, before being taken away by the wind.
Knowledge, gone. Time, wasted.
What I’m saying is not that we should devise techniques which enable us to recite everything we’ve learned. That’s why we’re not talking about, for example, retaining the date of the French revolution.
However, you should learn by heart the lessons it tells you about how the world works and update your representation of reality accordingly.
In other words, you should use it to inform your unconscious — the sum of your mental models.
I’ve long been skeptical about mental models since (1) they’re all the rage now and (2) no one seems to be able to explain in concrete terms what they are. A dangerous combination.
It turned out my doubt was due to ignorance on my part.
A mental model, as Wikipedia tells us, is
Every problem and situation is just another ‘one of those’ — another one of a certain type. Figuring out what type it is and reflecting on principles for handling that type of issue will help you do a better job.
On the conscious level, mental models allow us to ‘fit’ different possible interpretations onto reality to see if it is ‘one of those’.
For example, according to Hanlon’s Razor one should “never attribute to malice that which is adequately explained by carelessness”. When your coworker hands you crappy slides for the presentation you have to give in five minutes — what’s going on here?
Which ‘one of those’ do we have here?
You can see how different mental models in our heads will cause us to reach different conclusions about the correct interpretation of the situation.
A mental model is a mental, simplified depiction of how something works. They are how we order complexity, why we consider some things more relevant than others, and how we reason. They help us filter, organize and understand.
For instance, according to Pareto distribution, “for many events, roughly 80% of the effects come from 20% of the causes”. When reviewing your client database, should you assume your income is distributed equally over paying customers (and only remove the non-paying ones), or should you assume that 20% of your customers bring in 80% of your cashflow, and also remove the paying customers from the bottom 20?
Which ‘one of those’ is this?
You can see how different mental models in our head will cause us to reach different conclusions about which course of action should be taken.
On an unconscious level, you can think of mental models as psychological lenses that color and shape what we see. They not only tune what we think and how we understand, but also guide which connections and opportunities we see in the first place.
In Me, Myself, and Us Harvard personality psychologist provides an illustration of this I find very intuitive:
We’ve now seen three ways the mental models we shape in our head influence our perception, decisions, and behavior. What about learning?
As Ryan Holiday has pointed out, when the number of connections you’re aware of increases, the ROI of reading grows exponentially. After we’ve built a web of mental models, more insights are within reach, after which our web is bigger, after which the relative distance to new learnings decreases further, and so forth.
But what isn’t there, can’t grow. So memorize them.
The more models you have — the bigger your toolbox — the more likely you are to have the right models to see reality. If a possible interpretation is not in our toolkit, we can’t use it to understand what’s going on. Indeed, those with few personal constructs and narratives have limited sense-making abilities. Their tools just don’t apply to many of the new situations they need to deal with in life.
So: you’ve got to have multiple models. If you just have one or two that you’re using, the nature of human psychology is such that you’ll torture reality so that it fits your models, or at least you’ll think it does.
The truth, however, in the contra-memorization argument is that knowledge has a half-life. Over time, one group of facts replaces another. Information and what you’ve learned loses its value as new information is generated.
Therefore, the most useful knowledge is education of how reality works at the fundamental level.
Fill your head with a big trunk and solid branches, not with leaves. Remember the mental models.
This helps because it increases your level in what scientists call “integrative complexity”: the skill to integrate multiple sources and perspectives into a bigger, more coherent picture.
The quality of our thinking is proportional to the models in our head and their usefulness in the situation at hand.
And that ability is true, future-proof, intelligence
So far, we’ve seen that [a] learning requires (1) deep focus and (2) ensuring that the newly acquired material makes the jump to long-term memory. This [b] only happens if there’s ‘something there’. So [c] whoever said having mental models ‘in your head’ is pointless probably didn’t know very much. Finally, [d] the more frames that we have at our disposal for making sense of the world, the better.
The next-most-obvious question is:
It requires that (1) you facilitate the leap from short-term memory to long-term understanding. Because this kind of long-term memory equals your repertoire of mental models, this, in effect, means you should (2) use it to build your latticework of mental models.
The most famous proponent of the concept is Warren Buffett’s business partner, Charlie Munger. He summed up the approach to wisdom through mental models by saying:
You’ve got to hang experience on a latticework of models in your head. This knowledge becomes your foundation. Your trunk. So when you read and connect things to this core, not only do you have a better idea of how things fit together, but you also strengthen those connections in your head.
OK, and how do we do that?
Now, the rest of this essay will cover the question burning on your mind:
For something to become a part of your assembly of mental models you need to process it. That happens through engagement and repetition.
Repetition works best with a system. We’ll get into how to build one later.
First, a word on engagement. For that, you need to become an active reader.
If there is one thing you take away from this guide, let it be that.
Active reading is reading with the conscious intention to understand, integrate and evaluate the information you’re reading.
Compared to more ‘passive’ reading, where you just take the words in, actively engaging with a book is more hands-on, deliberate, and slower. But the payoff is immense.
There are different ways to use active reading to maximize the ROI on reading, depending on why you’re reading.
Mostly, I read books and academic papers. I use different methods for these different materials, because the density of information is so vastly different.
Papers are usually around 20 pages and take me four hours. I don’t measure my reading speed when it comes to books — it sucks the joy out of it, I’ve found — but I suspect it’s much higher.
Difference number two is in the ’what for’ question. I read books for fun — out of curiosity and a desire to increase my understanding of a particular subject. The focus is on being present.
As Naval Ravikant points out on the Farnam Street podcast, most books have the one point to make and it’s fine to fast-forward and skip and skim and do all these other sinful things.
I read papers, by contrast, because I plan to discuss them in my dissertation. That requires me to go into the nitty-gritty. The focus is on the hard note-taking.
So ask yourself: what am I reading this for, and how deep do I want to go?
I’ve outlined the rest of this guide in three parts:
Let’s say you’re reading a book on fundamental physics for fun (as I did during the Christmas break). Still, you want to make sure the information you absorb ascends into your toolkit of mental models. In that case, you can’t get away without some form of note-taking. As Danny Forest eloquently observes, devouring non-fiction books without taking notes is an “unproductive skill”.
Remember: the jump to long-term memory requires (a) processing and (b) repetition. What’s the best way to incorporate that into the reading process, without the note-taking transforming our entertainment into a laborious task?
What’s the 80/20?
Enter: mindmapping.
Mind mapping is a visual technique for summarizing the material that is specifically designed for the purpose of building a mental picture and seeing new connections. It’s perfect for understanding the broad picture and updating your mental representation of your reality — because a mindmap is a visual representation of reality!
The reason they work so well is that they get both parts of your brain involved. When you read a “normal” summary, you mainly use your left hemisphere, which processes language. By using colors, images, symbols and arrows, in mindmapping, you also use your right hemisphere. By using both halves of the brain together, you can process and understand information faster and remember it better. In addition, the spatial planning in the mind map makes it easier to distinguish between the main and side issues of the material, it saves you time because you only write down keywords and it is especially nice to work with the material in this way.
Start with the subject of your mind map. The subject is the central idea and is similar to the title of a book or chapter. Place it in the middle of an empty sheet of paper. Then add the following things:
(I’ve spent some hours researching free digital mindmapping tools and found ViewYourMind to be superior, but prefer analogue cause it seems to be more effective and is more fun.)
A mindmap can only be one page, so it forces you to structure the information. To be able to impose structure on the material, you need to (again) be clear on why you are reading this book. For entertainment? To understand something or someone you don’t know? To get better at your job? To improve your health? To learn a skill? To help build a business?
Your answer will change which parts are relevant and which aren‘t, so think about this.
Again, you don’t just want to collect information. That will never stick.
Mind-mapping is great for getting the core concepts of the book and ‘seeing’ how they relate to each other. But sometimes, you want a bit more depth. Something we jotted down and can refer to, perhaps akin to a summary. At the same time, we don’t want to turn it into a note-taking monster.
What can we do?
For this, Shane Parrish from Farnam Street came up with a trick:
After you’ve completed a chapter, write bullet points on what you want to take away from it.
I like this because it will give you a concise list of bullet points per chapter, without interrupting the flow of reading and without you having to write stuff you don’t care about just for the summary to be complete.
So, what does the overall, diachronic process look like?
To repeat: the process of learning comprises reflection and feedback, or engagement and repetition. If you read something and you don’t (1) build a vivid mental picture, (2) make mental links and (3) make time to think about what you’ve read, the ROI will be low.
Yes, this takes more mental effort — remember: no more passive reading — and more time. So a small aside on why you were doing all this in the first place.
This is crucial because if come to detest this process it will kill your reading appetite.
Satisfying your curiosity in the best way possible and maximizing your learning shouldn’t feel like a burden. If it does, reconsider your motivation or choice of topic.
Also: put the book down if you lose interest. Because this is counterintuitive for most people — many of us have it ingrained into us that we should ‘finish what we started’ and that this applies to everything, from goals we set to cakes we eat to books we read — I’m going to repeat myself. Stop when bored. It’s okay not to finish a book that doesn’t bite you.
In Antifragile, Nassim Nicholas Taleb explains why this not lazy idleness, but smart effectiveness:
From now on, things are getting serious.
The method I’ll discuss below is not for those who enjoy spending their days off dabbling in fundamental physics. This is for situations where you need extensive reference notes and/or are gunning for detailed understanding.
A warning upfront: that means we’ll be studying, as opposed to mere reading. So if active reading already was a bit much for you, feel free to skip this section.
To ignite the twin-engines of learning — engagement and repetition — for studying, I use a three-layered process. I take notes following the QEC method, upgrade my marginalia and put my unconscious to work.
Studying requires notetaking. However, don’t simply transcribe or summarize the facts presented in the material. Remember, the point of active reading is that you — actively — engage with and process the information. Transcription is too passive.
One approach is to use the QEC (question/evidence/method), which I picked up in Cal Newport’s How to Become a Straight-A Student. Here’s Newport:
QEC notes start with the question posed by the information you’re consuming. For example, when you’re reading the great book Utopia for Realists, you might, when devouring the argument in favor of universal basic income, come across a section that discusses the cynic’s false pet theory that people are creatures without intrinsic interests and would stop doing stuff if there would be no financial incentive. Then, instead of coming away with pages of notes, you’re supposed to reconstruct the argument in a few lines.
As the section continues, record the relevant facts below the question — these will form the Evidence. They’ll look like bullet points
You’re not off the hook yet. As you record this evidence, begin thinking about what conclusion the data is pointing you toward. Review your evidence as it grows and make up your mind when the time is right. In our example, it might read something like:
Or when you’re writing a dissertation in meta-ethics, a QEC sample might look like this:
Remember, we are studying, and devising ways to maximize how actively we engage with the information presented to us. The QEC method promotes active reading, and hence learning, because it forces you to process the information as it’s presented and consider what is important about what you’re reading — not just copy it down.
The second layer is what I call ‘upgraded marginalia’. ‘Marginalia’ are when you mark out thoughts, questions, and connections to other ideas’ in the margins.
Because they increase your engagement with the material, they rock. The more you have a go at the information, and try to understand it, the better.
However, to become a part of our cataloged notes, we need to systematize our marginalia. If we don’t have a system for that, they’ll get forgotten — unless you want to manually check every book every now and then for marginalia. A time-consuming habit.
Here’s what I do — this is writing in the margins for pros.
This looks something like this:
Then snap a picture and add it to your archive in the appropriate way (yes, I‘ll tell you how later).
The goal behind doing this is to digest what you are learning and make it your own — make associations, draw connections, play with it, hold it in your mind.
Doing this takes time and processing and writing and thinking. It takes time to make mistakes and recognize them, to make false starts and correct them, to process and evaluate complex information.
This shouldn’t be a surprise. You’ll do your best thinking by slowing down and concentrating. So don’t be afraid to spend hours working out your marginalia. It’s one of the most satisfying things to do.
For me, some thinking sessions for working out marginalia have lasted hours and resulted in pages of golden connections. These breakthrough moments have me living on a cloud for days.
The final engine we’re leveraging for maximizing the ROI is a nice little hack that has given me a lot of ‘free’ ideas with just a five-minute time-investment per day.
As with almost anything in this guide, I didn’t come up with it. This time, the source is Ralph Waldo Emerson, who advised to
The idea is to intentionally direct the workings of your subconscious mind while you’re sleeping. I don’t know if this exercise trades on a placebo effect or sets something more real in motion, but anyway, it works.
Every night, I take out an empty piece of paper and jot down thoughts and a follow-up question relating to what I’ve been trying to understand. And every morning (except on Cheat Day), the first thing I do after waking is stumbling to my desk and to harvest the fruits of my unconscious by answering last night’s question.
I often get small but compounding flashes of insight. In fact, many of my most original or ‘deeper’ connections occurred to me in these first five minutes after waking.
I believe that these sparks of inspiration are a direct consequence of the daily journaling, and that my unconscious wouldn’t toss me so many useful thoughts without it.
This was a long part, so let me summarize.
To maximize learning ROI, we need to maximize our engagement with and reflection on the material. Reviewing and repeating will be covered in the next section. This segment focused on maximizing engagement.
We saw that your reading goal matters a lot, but that no matter what your learning goal is, as long as you have one, you should avoid passive reading.
When you’re in it for a broader update of your map of the world, I recommend mindmapping. It’s relatively low time-consuming, though high mental effort. That’s because it forces you to actively organize and re-organize the information as you have limited spaces and may not use sentences. The draw- and color elements both provide bites of fun and engage both your hemispheres for maximal processing.
Alternatively, when you’re in it for the nitty-gritty and possibly need detailed notes as reference material, I’d recommend a three-layered process. Use the QEC method while reading, upgrade your marginalia to make new connections instead of vaguely noting their possible presence, and put your unconscious to work for some low-effort good ideas every morning. Note that both the QEC and the upgraded marginalia are time-consuming and high-mental effort.
Adding all this up, here’s the complete diachronic process for reading a book QEC style.
On to the next question: how to remember all this shit and avoid the decay of your carefully built mental models?
After we’ve grappled with the information, true learning requires an additional ingredient of repetition or reflection.
This needn’t be complex, but the truth of the matter is that many people never go back to their notes or mindmaps. We need to self-hack ourselves into doing so and design a system for it.
While there are hundreds of systems on the internet, you need to take one of them and adapt it until you have your own system. Some, like Ryan Holiday, prefer to record notes on index cards or in a commonplace book; others prefer a digital system.
There are endless ways of organizing your notes — by book, by author, by topic, by the reading date. It doesn’t matter which system you use as long as you will be able to find the note when you need it. So, whatever method you end up settling for, make sure there is a method behind it and that you can logically determine where the note is. Don’t rely on memory for this.
Be airtight in implementing and adhering to machinery for this purpose. It might seem otherwise, but being fully organized in fact costs less energy than half-assing it because only when you can trust yourself and the system you’ve set up, the fact that you have a system saves you the mental resources of having to think about it ‘Did I process that note? Where did I put it? I know I have a tag for this but it isn’t there — wait let me review all the other places I might have put it.’ This is no longer a timesaver.
As mentioned, I prefer to put my ‘upgraded marginalia’ and stream-of-consciousness journaling in the same note as the mindmaps and QEC of the original source. This makes the most sense to my brain. I guess you can also construct elaborate theme-based instead of ‘source-based’ notes, combining different books and marginalia and mindmaps in one note(book), but I prefer tags for that. Nonetheless, as many debates in the Evernote community emphasize, this seems to be a matter of personal preference.
There is a very important caveat considering cataloging and reviewing.
Only do when you can apply it to a new learning project or to something you’re spending your time on. Review when you have a new learning question — and not because you have to because a month has passed or whatever. That is boring, and you won’t do it.
Therefore, I advise to only schedule time to read and review these notes if you’re in a longer writing or learning process. While writing a dissertation chapter, I review all appropriately tagged notes every week. But if you can neither (i) apply it to a learning question or (ii) a project, reviewing is likely to have a limited ROI, (especially when your archive has become large).
As you saw, the first step of reading a new book is reviewing old notes and mindmaps. Making periodical review an actual habit is the most important thing and this does the trick.
For improved learning, don’t just go over your notes over and over. Rereading silently to yourself costs an incredible amount of time but produces only mediocre results.
The single best strategy for organizing constant growth, I’ve found, is by involving fellow human beings. To test your understanding of something — anything — explain it to someone.
You’ll have to remove jargon, describe why this information has meaning, and walk them through yours or the author’s logic. It sounds simple. It’s damn hard and constitutes the litmus test of your comprehension.
Many people, even those who are supposed to be ‘smart’, use complicated vocabulary and jargon to mask shortcomings in their knowledge.
One method you can use is the so-called Feynman Technique. It has four steps:
Participate in seminars, organize reading groups, write about it publically, tell your friends, spouse or kids what you read about today — get out and socialize 😃.
Farnam Street (Shane Parrish) adds:
Shane is not, because the second strategy for optimizing recollection has you do this explicitly. It’s called active recall.
This technique has you explain the relevant ideas out loud, without peeking at your notes, as if lecturing an imaginary class.
As with most of the methods described in this guide, active recall requires more mental energy than the alternative. But in exchange, it allows you to learn the material better and in much less time.
Many of us want to get something from the books we read, yet also believe acquiring information and learning are the same thing. Nothing could be further from the truth.
To learn, we need to get the information into our latticework of mental models. For a higher ROI on reading, we looked into the skill of meta-learning. We found that, to promote information from short-term memory to your understanding of the world, we need to (i) engage with and (ii) reflect on it.
The former demands we become active readers. The right reading strategy for this depends on your goals. We’ve covered mindmapping with bullet-point notes, on the one hand, and the QEC method with upgraded marginalia and nightly questions, on the other.
The latter is best done by implementing a system to ensures regular review (every time you start a related book, for example). The best ways to ensure constant progress in understanding are active recall and the Feynman technique.
If you get into the habit of active reading, your life will change.
Remember how curious you was a child? Reading and learning will turn into an amazing adventure, and the world will once again be full of mysteries.
You’ll become a highly creative person.
Personal growth will once again be something you own, rather than something you had an awkward relationship with since school trained you into a one-trick pony and you lacked the confidence to venture further.
You’ll get flashes of insights during random moments every single day.
People will start noticing your ability to make connections, understand situations as one of those and point out cool, unexpected features they could never have noticed themselves.
You’ll get tremendous joy and relationship growth out of sharing this new attitude and knowledge with others.
They will suddenly respect you as the go-to wise person and compliment you for nourishing your intellectual interests.
But above all, this feeling of progressing deeper and deeper on your quest for understanding is simply the best there is.
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The Complete Guide to Effective Reading
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