Hmmmm..... one thing I always do is pick up pennies off the ground for good luck. Somebody told me that it matters whether the face or the back are showing, as far as good luck, but I don't care, I just pick them up anyway. I also never throw out pennies after they are swept/vacuumed up - this comes from my mom, who used to tell us that if we threw out money, we'd never get any more because we didn't care about it. (Not sure where she got that one from.) And I admit that I try not to walk under ladders. I have been known to throw a pinch of salt over my shoulder after I knock over the shaker and spill it , even though I have no idea which shoulder, so I do both. These are all such irrational things, and I should know better, but I guess they're just habits ingrained from childhood.