Write atomic notes

One note holds exactly one idea, complete on its own.

Why it works

Confining a note to a single idea makes it reusable — it can be linked into many different contexts rather than being trapped inside one document. Atomicity also forces you to identify what the idea actually is, separating it from the source it arrived in. Small, self-contained units are what let a note collection recombine into new thoughts.

How to do it

1. When an idea is worth keeping, give it its own note rather than burying it in a longer document.
2. Write the note so it stands alone, understandable without the original source open.
3. If a note contains two ideas, split it into two.

Evidence

Atomicity is a structural principle of the Zettelkasten method as described by Ahrens; it is practitioner design rather than an experimentally tested intervention on its own. (mechanistic)

There is no controlled trial showing atomic notes beat other formats; the case for them is structural — atomic units are what make linking and reuse possible.

Sources

• Ahrens (2017), "How to Take Smart Notes" (the principle of atomic, self-contained notes)

Common mistake

Writing sprawling notes that bundle many ideas, which cannot be linked precisely and end up as unsearchable dumping grounds.