Personal Productivity System (GTD/Second Brain)

Design my personal productivity system. Profile: work type {{...}}, tools I use {{...}}, failure modes with past systems ({{too complex / abandoned}}). 1) Capture: one universal inbox (where, how fast), rule that everything leaves head in under 10 seconds; voice/quick-capture setup. 2) Clarify (GTD 2-minute rule, actionable vs reference), organize into: calendar (time-bound), next actions by context, waiting-on list with follow-up dates, projects (any multi-step outcome) list, someday/maybe, reference folders. 3) Weekly review: exact 45-minute checklist with template. 4) Daily: MIT planning, time-blocking, shutdown ritual. 5) Knowledge: notes captured as reusable notes with title/linking rule (progressive summarization). 6) Tool setup steps in my actual apps with views/filters. 7) Anti-complexity rule: max this many lists; what to delete. Keep maintainable — optimization that survives a bad week.