Zettelkasten rules
Atomize thoughts
Each zettel should contain one single idea. Putting multiple thoughts in a single zettel effectively creates static links. It undermines the dynamic behavior that makes the method powerful.
Write everything in your own words
Zettels are discreet personal thoughts, not citations. The goal is to have captured the thought you had when you encountered the thing you are citing.
Contextualize links
The zettelkasten method is oriented around building quality connections between thoughts (i.e. relevance maps). Links with explicit context have maximum utility.