Obsidian Help (Official Documentation)
Obsidian
Official documentation for Obsidian: creating a vault, Markdown syntax, internal links and backlinks, tags and properties, plugins and themes, Web Clipper, and syncing. Kept current with each release by the development team.
More resources on Personal Knowledge Management (Zettelkasten, Obsidian)
Communicating with Slip Boxes (Kommunikation mit Zettelkästen, 1981)
Luhmann's own 1981 essay on why he treated his slip box as a communication partner: the roles of arbitrary internal branching, reference structure, and surprise in generating ideas. Full English text with translator's notes.
Evergreen Notes — Andy Matuschak's Working Notes
A public note collection arguing notes should be atomic, concept-oriented, densely linked and written for yourself. The site is itself a working example: navigation happens by following links between notes rather than a hierarchy. The rare case where the artifact demonstrates the practice — you learn the method by reading a system built with it. Free, continuously maintained, and it directly addresses the topic note's 'a system you keep using' angle by arguing note-taking is a thinking discipline, not an app choice.
Introduction to the Zettelkasten Method
Book-length free essay covering the history of Luhmann's slip box, the anatomy of a single note, ID schemes, structure notes, and how connections between notes rather than collection produce new thinking. Tool-agnostic throughout.