When should you start a new note?
The following image shows when you should start a new note for your slipbox. And what to do if there are similar notes:
Start by finding similar notes, if there aren’t any make a new note. If there are notes, but not related, make a new note.
Notes related to the topic exist, if these do not fit the idea create a new note but adhere to the keywords.
A few notes roughly match: creating a new zettel is a bit too much.