Stay well away from the fudge. Go get something like peppermints. You can only eat a few and you don't do too much damage. Fudge is bad because it has heaps of fat as well as sugar. Otherwise get a milky way. They do very little damage.
My thing at the moment is a thick slice of fresh white bread with orange marmalade (no butter). I swear it is as good as cake but with a tenth of the fat.