SuperFocus
I used to follow David Allen Getting Things Done.
Now I find Mark Forsters Getting Everything Done using SuperFocus (SF) suits me more.
5 Speeds of SF - Alan Baljeu 24mar11
Now(1min) - just do it.
Urgent(1h)- enter C2, do it before turning page
Soon (1d) - enter last page, do when you arrive
Near Future (1w)- enter last page, do sometime before page is dismissed
Medium Future. (1mo) - enter last page, let it be dismissed, resurrect upon a future review
Parked (Never) - enter whereever, delete any time.