I found this Irish blessing today. Thought it to be a good one...
May you have the hindsight to know where you've been
the foresight to know where you're going
and the insight to know when you're going too far.
(And as my friend Sootie would say, And may you be in heaven half an hour before the devil knows you're dead.)
Protect your quit as if it were your life, because it is!