My mother's version was that if your nose itched, it meant you were going to have argument! If you dropped money, you were going to get money (Money on the floor, money to the door). If you dropped a knife, a woman was going to come see you (Knife, a wife).

My Italian friends have a LOT of superstitions. You can't come in one door and go out another at someone's house - gotta use the same door. And if you sneeze while talking, they always say (THAT'S THE TRUTH!)...in other words, sneezing confirms what you're saying. HA!