getting things done, the five steps

From gettingthingsdone.com itself, not someone's summary of a summary.

01
Capture
everything that has your attention goes into a collection tool, not your head
02
Clarify
03
Organize
04
Reflect
05
Engage
trust the system enough to choose actions from it with a clear head. easier said than done

Or start a list of your own. Free, it takes a minute.