“Thinking deeply” about a problem seems like a self-evident activity, but in reality it’s not. When faced with a distraction-free mental landscape, a hard problem, and time to think, the next steps can become surprisingly non-obvious. In my experience, it helps to have some structure for this deep thinking process. I suggest starting with a careful review of the relevant variables for solving the problem and then storing these values in your working memory. For example, if you’re working on the outline for a book chapter, the relevant variables might be the main points you want to make in the chapter. If you’re instead trying to solve a mathematics proof, these variables might be actual variables, or assumptions, or lemmas. Once the relevant variables are identified, define the specific next-step question you need to answer using these variables. In the book chapter example, this next-step question might be, “How am I going to effectively open this chapter?,” and for a proof it might be, “What can go wrong if I don’t assume this property holds?” With the relevant variables stored and the next-step question identified, you now have a specific target for your attention.
Assuming you’re able to solve your next-step question, the final step of this structured approach to deep thinking is to consolidate your gains by reviewing clearly the answer you identified. At this point, you can push yourself to the next level of depth by starting the process over. This cycle of reviewing and storing variables, identifying and tackling the next-step question, then consolidating your gains is like an intense workout routine for your concentration ability. It will help you get more out of your productive meditation sessions and accelerate the pace at which you improve your ability to go deep.
Memorize a Deck of Cards
Given just five minutes, Daniel Kilov can memorize any of the following: a shuffled deck of cards, a string of one hundred random digits, or 115 abstract shapes (this last feat establishing an Australian national record). It shouldn’t be surprising, therefore, that Kilov recently won back-to-back silver medals in the Australian memory championships. What is perhaps surprising, given Kilov’s history, is that he ended up a mental athlete at all.
“I wasn’t born with an exceptional memory,” Kilov told me. Indeed, during high school he considered himself forgetful and disorganized. He also struggled academically and was eventually diagnosed with attention deficit disorder. It was after a chance encounter with Tansel Ali, one of the country’s most successful and visible memory champions, that Kilov began to seriously train his memory. By the time he earned his college degree he had won his first national competition medal.
This transformation into a world-class mental athlete was rapid, but not unprecedented. In 2006, the American science writer Joshua Foer won the USA Memory Championship after only a year of (intense) training—a journey he chronicled in his 2011 bestseller, Moonwalking with Einstein. But what’s important to us about Kilov’s story is what happened to his academic performance during this period of intensive memory development. While training his brain, he went from a struggling student with attention deficit disorder to graduating from a demanding Australian university with first-class honors. He was soon accepted into the PhD program at one of the country’s top universities, where he currently studies under a renowned philosopher.
One explanation for this transformation comes from research led by Henry Roediger, who runs the Memory Lab at the University of Washington in Saint Louis. In 2014, Roediger and his collaborators sent a team, equipped with a battery of cognitive tests, to the Extreme Memory Tournament held in San Diego. They wanted to understand what differentiated these elite memorizers from the population at large. “We found that one of the biggest differences between memory athletes and the rest of us is in a cognitive ability that’s not a direct measure of memory at all but of attention,” explained Roediger in a New York Times blog post (emphasis mine). The ability in question is called “attentional control,” and it measures the subjects’ ability to maintain their focus on essential information.
A side effect of memory training, in other words, is an improvement in your general ability to concentrate. This ability can then be fruitfully applied to any task demanding deep work. Daniel Kilov, we can therefore conjecture, didn’t become a star student because of his award-winning memory; it was instead his quest to improve this memory that (incidentally) gave him the deep work edge needed to thrive academically.
The strategy described here asks you to replicate a key piece of Kilov’s training, and therefore gain some of the same improvements to your concentration. In particular, it asks you to learn a standard but quite impressive skill in the repertoire of most mental athletes: the ability to memorize a shuffled deck of cards.
The technique for card memorization I’ll teach you comes from someone who knows quite a bit about this particular challenge: Ron White, a former USA Memory Champion and world record holder in card memorization.* The first thing White emphasizes is that professional memory athletes never attempt rote memorization, that is, where you simply look at information again and again, repeating it in your head. This approach to retention, though popular among burned-out students, misunderstands how our brains work. We’re not wired to quickly internalize abstract information. We are, however, really good at remembering scenes. Think back to a recent memorable event in your life: perhaps attending the opening session of a conference or meeting a friend you haven’t seen in a while for a drink. Try to picture the scene as clearly as possible. Most people in this scenario can conjure a surprisingly vivid recollection of the event—even though you made no special effort to remember it at the time. If you systematically counted the unique details in this memory, the total number of items would likely be surprisingly numerous. Your mind, in other words, can quickly retain lots of detailed information—if it’s stored in the right way. Ron White’s card memorization technique builds on this insight.
To prepare for this high-volume memorization task, White recommends that you begin by cementing in your mind the mental image of walking through five rooms in your home. Perhaps you come in the door, walk through your front hallway, then turn into the downstairs bathroom, walk out the door and enter the guest bedroom, walk into the kitchen, and then head down the stairs into your basement. In each room, conjure a clear image of what you see.
Once you can easily recall this mental walkthrough of a well-known location, fix in your mind a collection of ten items in each of these rooms. White recommends that these items be large (and therefore more memorable), like a desk, not a pencil. Next, establish an order in which you look at each of these items in each room. For example, in the front hallway, you might look at the entry mat, then shoes on the floor by the mat, then the bench above the shoes, and so on. Combined this is only fifty items, so add two more items, perhaps in your backyard, to get to the full fifty-two items you’ll later need when connecting these images to all the cards in a standard deck.