Another way mentioned in the FAST cd's is to add date specific information to your calendar e.g. if you are very worried that you will miss a due date on a next action then put a note in your calendar on the day before " <important action> due tomorrow". This is belt and braces but as long as it is off your mind but still in your system then you're OK.
A bit like trying to watch a film on an old TV that buzzes intermittantly, tap the TV then listen and if the buzzing stops you feel great (it's off your mind)