What works for me:
a four tier plastic tray organizer.
top layer : bills to be paid, calls to be made. corresp. to answer..
2nd layer: pending file - stuff which needs further followup. I write
the flwp date in red in upper left corner, and review it once a week.
3rd layer: info I want to keep handy for imminent task e.g. info on
the guy who fixes
something, next time I'm in his area.
4th bin: stuff to be filed. I try to empty this at least once a week.
Hanging files in desk drawer for stuff I file into at least once a
PUrge this yearly.
Then, stuff I still wish to keep goes into archives cabinet - stuff I
might need in future. PUrge this on rainy days.
Also, this cabinet has files I go into maybe ev. 6 months e.g.