Zettelkasten: How to link and Organize notes (with 🎯 Hub Notes & Obsidian)

Building a Zettelkasten isn’t mainly about sorting notes into neat folders—it’s about using linking to develop ideas. The core workflow splits into two stages: discovery, where notes are gathered and rough understanding is formed, and development, where those notes are reviewed, connected, and turned into “trains of thought.” The practical takeaway is that organization should serve thinking, not replace it.

In the discovery stage, the system starts with three node types: fleeting nodes, literature nodes, and permanent nodes. Fleeting notes capture quick observations; literature nodes store ideas and references from sources; permanent nodes hold distilled, durable insights. To connect everything meaningfully, the transcript emphasizes a hub-based approach inspired by Niklas Luhmann’s index (a keyword list linking to related notes). The creator adapts that idea by introducing “hub notes”—springboards for useful trains of thought. Hub notes are intentionally broad starting points such as empowering questions, topics, skills, or future knowledge goals. Their job is to anchor incoming material so later synthesis can branch into coherent lines of reasoning.

Linking then becomes the mechanism that turns scattered notes into structured thinking. Two link directions matter: outgoing links and backlinks. Outgoing links are manually placed; in apps like Obsidian, they represent deliberate connections from one note to another. Backlinks are automatically generated when a note is linked to; they help surface supporting context and references, but they require deliberate use because they are not curated by the author. The transcript’s rule of thumb is directional: backlinks are best for supporting material and referral—especially for gathering context from literature and permanent notes—while outgoing links are best for extending an idea, particularly in the discovery phase.

A concrete example centers on the concept “maintaining a beautiful state” from Tony Robbins. A hub note is created for that question, and during discovery, many notes—permanent, literature, and fleeting—are linked back to the hub to supply raw material. Once enough information accumulates, the development stage begins: the notes are reviewed and synthesized into four “trains of thought.” In this case, the trains are: (1) make self-care a priority, (2) be mindful (keeping the mind “like water,” echoing David Allen’s framing), (3) focus on constructive actions rather than uncontrollable worries, and (4) handle setbacks, since resilience shapes happiness.

Each train is visualized as a branching path from the hub into permanent nodes, where clicking a node continues the line of reasoning and forks into related sub-insights. To track these branches, the workflow experiments with tags in Obsidian—using tags (including slash-based numbering) to group permanent notes by which train they belong to. The overall message is pragmatic: there is no single correct setup, but a hub-and-link strategy can make idea development easier while still producing a more organized vault as a byproduct.