General parts of a productivity system

Lots of different needs overlap in a productivity system:

I currently use a mix of things:

The most fundamental concepts of productivity are

Tables:

- Next Action
- Tasks
- Projects
- Urls
- Tags
- Snippets
- Calendar-items
- Chores (recurring once completed)
- Dependencies
- Notes
- Quotes
- Articles
- Memorisation
- Surveys
- Focus tools