- The way to collect ideas using the Zettelkasten Method is to use a branching card system, where numbers and letters are used to ‘address’ or pinpoint the sequence as well as the branching hierarchy of an idea.
- A card address can be 1/1, or ½, or 1/2a based on the idea and connecting ideas it has.
- Another method is to add references at the bottom of the cards, jotting down the addresses of ‘related’ ideas, making cross-referencing easier.
- This method is similar to hypertext and URLs of the digital age, though in a completely analogue form.