How do I practice unique identifiers?

The most direct way to practice unique identifiers is through a focused exercise: Open your note system. Search for any term that returns 3+ results with similar titles — 'meeting notes,' 'project plan,' 'ideas,' 'architecture.' For each collision, assign a unique identifier: a date prefix (2026-02-22), a sequential ID (IDEA-047), or a descriptive slug (architecture-decision-event-driven-rewrite). Rename the note so the identifier is part of the title. Time: 10-15 minutes. Artifact: 3-5 renamed notes with unique, unambiguous identifiers.

Common pitfall: Using titles as identifiers. Titles feel unique when you create them, but they collide over time. You end up with three notes called 'Q4 Planning' and two called 'Onboarding Process.' The collision is invisible until someone links to the wrong one and makes a decision based on outdated information. The fix isn't better titles — it's a separate, stable identifier that never changes even when the title does.

This practice connects to Phase 2 (Atomicity and Decomposition) — building it as a repeatable habit compounds over time.