[Jtsummers]

https://gettingthingsdone.com/what-is-gtd/

The five basic steps of GTD:

1. Capture

2. Clarify

3. Organize

4. Reflect

5. Engage

(2) and (4), in particular, deal with whether the actions are worth doing along with the when and where of doing them. Which is covered in all the decent summaries I've read and the book itself.