Zettelkasten

Zettelkasten is german for "card index box".

Nonlinear note taking system. Notes (Zettel) compose a web of knowledge. Their organization follows the guidelines:

1. Each note has a unique identifier;
2. Each note contains a single core idea;
3. Each note (optionally) contains tags;
4. Each note links to other related ideas.

If tagging the note, try to limit to three or four tags.

To implement it, one will need three Building blocks of a Zettelkasten.