A Beginner's Guide to Building a Commonplace Notebook

A commonplace book is the least glamorous and most useful notebook you can keep. There is no fixed format, no daily page waiting to be filled, and nobody checking whether you have kept up. It is simply a place where you write down what is worth keeping — a line from a novel, an idea that arrived on a walk, the shape of an argument you want to remember — and arrange it so you can find it again.

Most notebooks fail because they have no job. A diary has a job. A shopping list has a job. A notebook labelled simply "notes" slowly becomes a graveyard of half-finished pages. A commonplace book has a clear purpose: it gathers material you intend to reuse, reread and think with.

What a commonplace book actually is

The name comes from the Latin locus communis — a common place, a general theme. From the Renaissance onwards, students, clergy and writers kept books in which they copied out passages under headings, so that a useful sentence could be found again years later. John Locke even published a method for arranging one, complete with an index.

Two distinctions are worth holding on to. First, a commonplace book is not a diary. A diary runs in date order and is tied to events; a commonplace book is organised by subject, and it is meant to be read again rather than merely written. Second, it is not a junk drawer. Not everything you read goes in. The point is selection: you copy out the sentence that stopped you, not the whole chapter around it.

Why it is worth the effort

Writing by hand is slow, and that slowness does real work. Copying a passage out forces you to hold it in your head for the length of a line or two, which is usually long enough to notice whether you actually agree with it. Typing a sentence into a folder takes four seconds and rarely produces that pause.

Retrieval matters too. A search box only helps if you already remember that something exists. A commonplace book is not a database; it is a record of your own attention, arranged so that browsing it turns up things you had forgotten you cared about. Readers often find that the most useful part is not the passage itself but the note they wrote underneath it two years earlier.

Choose one container and stop deliberating

The format matters far less than people assume. Common choices:

• A5 bound notebook. Cheap, portable, and pleasant to write in. You will need to number the pages yourself.
• A ring binder with dividers. Easy to reorganise, and you can add pages to a section without leaving gaps. Bulkier to carry.
• Index cards in a box. One idea per card, reshuffled at will. Excellent for quotations and fragments, hopeless for long reading notes.
• A plain text file or notes app. Searchable and always with you, though you lose the handwriting and the serendipity of flipping through pages.

The right choice is the one you will actually pick up. What kills commonplace books is spreading them across three notebooks and an app, so that no single place ever becomes the one you check.

Setting it up in ten minutes

1. Number the pages. If your notebook arrives unnumbered, do it now, in one sitting, before you write anything else. Every index depends on it.
2. Reserve the first few pages for an index. Add topic headings and page numbers as you go. A rough index beats a beautiful one you never start.
3. Decide on a handful of broad headings, or none at all. Four or five, such as Reading, Ideas, Words and Questions, is plenty. If choosing headings feels like a project, skip them and rely on the index.
4. Date and credit every entry. The date tells you who you were when you wrote it; the source lets you go back to the original.
5. Leave the outer margin blank. That strip is for second thoughts, cross-references and the note you will want to add a year later.

Then start. An empty commonplace book that is waiting for the perfect system is worth nothing at all.

Reading notes that stay useful

Read with a pencil and mark anything that makes you stop. Do not break off to write long notes mid-chapter; that turns reading into admin. Instead, set aside five minutes when you finish the book or a long chapter and transfer only what still seems worth having. You will find that most of your marks lose their shine, which is exactly the filtering you want.

A single page per book is usually enough. Use a template like this one, and adapt it as your interests change:

Title and author — finished 4 June
The argument in three lines: the main claim, the evidence offered, and the part that convinced me least.
Quotes: two or three lines worth returning to, copied exactly, with page numbers.
My reaction: what shifted in my thinking, and what I still disagree with.

That last field is the one people skip and the one that makes the page valuable. A summary you could have found online is not worth much; your argument with the author is.

Keeping it alive

Ten minutes a week is enough to keep a commonplace book going. Put it somewhere you sit anyway — beside the chair where you read, or in the bag you take to work. When a line lands, write it down that day; the sentence you meant to copy tomorrow is gone by tomorrow.

Resist tidiness. A commonplace book with crossings-out, arrows and a scrawled addition in the margin is doing its job; a pristine one usually means you are writing for an imagined reader rather than for yourself. Skip entries when nothing deserves one, and never fill pages to reach a quota.

Once a year, read back through it with a pencil in hand. Add index entries you missed, and mark the pages you would want if you only had ten minutes. That habit is what separates a notebook that slowly fills up from one that quietly teaches you what you have been thinking about.

Photo: Cup of Couple / Pexels