Keep a Commonplace Book
Great quotes and ideas vanish — you read them, love them, and never find them again. A commonplace book is the old-fashioned fix: one place where you copy the lines worth keeping, organized loosely by theme. Writers have used them for centuries; the system still beats scattered screenshots.

TL;DR / Quick Fix
Quick fix: keep one notebook or document where you copy quotes and ideas worth remembering, grouped by loose themes. Add the source and date to each entry. Review it monthly — a commonplace book you never reread is just a diary.
Follow these steps
- Choose one home for it. A paper notebook or a single digital document — not five apps. One home is the entire discipline.
- Copy only what earns it. If a quote does not make you stop and think, it does not go in. Selectivity is what makes the book valuable later.
- Add source and date. Every entry gets where it came from and when. Future you will want to find the original — and will thank present you.
- Group loosely by theme. Broad sections — work, life, ideas — beat rigid taxonomies. See note organization for digital options.
- Revisit it monthly. Flip through for ten minutes a month. Old entries spark new connections — that is the compound interest of the system.
- Let it feed your own ideas. The point is not collecting quotes — it is thinking with them. Add your own reactions beneath entries that provoke you.

What NOT to do
- Do not copy entire chapters. A commonplace book is a curated shelf, not a photocopier.
- Do not skip the source. An unsourced quote is a dead end when you want more.
- Do not run five systems at once. One book, kept simply, beats a perfect system abandoned.
- Do not treat it as a to-do list. Ideas and tasks live separately — mixing them buries both.
Frequently asked questions
Paper or digital?
Paper feels better for many; digital is searchable. The best is the one you will actually open monthly.
How is this different from book notes?
Book notes capture one book; a commonplace book collects across everything you read — see book notes.
How often should I add entries?
Whenever something strikes you — weekly is plenty. Forcing daily entries kills the habit.