Start by choosing what is worth keeping
These techniques take effort, and effort is limited. Before applying any of them, decide what you want from the text. A leisure novel may need nothing beyond enjoyment. A work manual, a course text or a book you want to build on for years deserves more. Spending your effort on the second kind is a better use of it than trying to remember everything.
The methods below are drawn from widely discussed ideas in learning research. Results vary from person to person, and none guarantees that you will remember a given thing.
Retrieval: test yourself
The single most widely supported idea is to practice recalling information instead of simply looking at it again. After finishing a section, close the book and try to write or say what you remember: the main idea, the key points, any terms or steps. Then check against the text and note what you missed.
This works because pulling information out of memory strengthens it, and because it shows you honestly what you do and do not know. It tends to feel harder than re-reading, and that difficulty is part of why it helps. Small versions are enough: a few minutes of recall practice at the end of a chapter beats an hour of passive re-reading. Questions you write yourself, or questions at the end of a chapter, can serve as prompts.
Space your reviews
Returning to material after a gap tends to produce longer-lasting memory than reviewing it all at once. A simple schedule might be to review the same notes a day later, then several days later, then a few weeks later. The exact gaps are less important than spreading the reviews out and making each one an effort to recall, not a casual glance. Even a rough habit of looking back over last week’s notes is useful.
Summarize in your own words
Writing a short summary after a chapter or article forces you to decide what matters and to put it in terms you understand. Keep it brief, often a paragraph, and do it without copying from the text. If a point is hard to express, you have found something not yet understood, which is useful to know. The habit of writing chapter summaries pairs well with recall, since the summary is a form of retrieval.
Take notes selectively
Notes help in two ways: they keep you engaged while reading, and they give you something to review later. The trick is to avoid copying large chunks. Short notes that capture ideas in your own words tend to be more useful than transcripts.
Options include:
- Margin notes. A brief word, question or symbol next to a passage keeps you thinking. These are especially useful in books you own, and there are ways to make margin notes without damaging the book.
- A reading journal. A notebook or file with a few lines per book or chapter, including favorite passages and your reactions. A reading journal serves as a long-term record, and the practice of keeping a reading diary can make it a pleasure and not a duty.
- Question notes. Writing questions in place of statements pushes you to answer them later, which doubles as retrieval practice.
Be cautious about highlighting
Highlighting is popular and feels productive, but studies of study habits suggest it often adds little by itself, especially when large amounts of text are marked. It can be useful when it is selective and followed by some further step, such as reviewing the highlights and rephrasing them. If you highlight, mark sparingly and treat the highlights as raw material for summaries or questions, not as the end of the task. Whether it is a helpful habit or false comfort depends largely on what you do afterward.
Explain it to someone
Explaining an idea aloud to another person, or to an imaginary listener, shows quickly which parts you understand. If you stumble, return to the text. Teaching or discussing a book with a friend or in a reading group also gives you a reason to retrieve and organize what you read. Many people remember their book club’s discussions better than their own solitary reading.
Connect new ideas to what you know
Memory is easier when new information attaches to existing knowledge. As you read, ask how the idea relates to something you already know, to a previous book or to your own experience. Making comparisons, finding examples and asking “why would this be true?” all promote this kind of thinking. Building vocabulary for a field also helps, because a personal word list gathers the key terms that other ideas hang on.
Read with questions in mind
Before starting, write down a few questions you hope the text will answer. While reading, look for answers; afterward, check whether you found them. This sharpens attention and leaves you with something to recall. The approach is the same one used in guiding questions, applied here to memory as well as understanding.
Use time wisely
- Pause at natural breaks. Stop at the end of a section and recall it, before moving on.
- Read in manageable sessions. Fatigue reduces what is taken in, so shorter sessions with breaks may beat marathon ones for demanding material.
- Consider a second pass. For important texts, second readings after a gap often reveal and fix what was missed the first time.
- Rest. Adequate sleep is generally thought to support learning, though it is no substitute for the techniques above.
What to skip
Some familiar habits give less than they promise:
- Re-reading the same page many times in a row.
- Highlighting everything.
- Copying passages verbatim without thinking about them.
- Assuming that because something felt clear while reading, it will be remembered.
Keeping it realistic
You do not need to apply every technique to every book. A workable minimum for something you want to remember is: read actively, jot a few notes, write a short summary and test yourself a few days later. Make it light enough that you will actually do it. Anyone with persistent difficulty remembering things in daily life, beyond ordinary forgetfulness, should speak with a doctor.