I know I'm going to catch some flak for this one, but I really did like Kate Moss's quote:
Nothing tastes as good as skinny feels.
And before I catch said flak, I don't mean uber-super-model thin but honestly...I'm working my butt off to have a strong, fit body and that 800 cal. crumbs cupcake might be great for 5 min, but overall I'm going to be miserable about it afterwards...that quote kind of is a reminder of how much do I REALLY want something before I eat it - it keeps me in check! Sorry if ppl disagree w/ that one.