it's a pinch of salt over your left shoulder if you spill salt to distract evil spirits,

many of the cliched superstitions have been mentioned...bless you when a person sneezes came from a belief that you sneezed out your soul, and if there was no bless you the devil would snatch it away...

find a penny face up, pick it up and all day you'll have good luck, find it face down, leave it on the ground.

put a penny in you left shoe to ward of the little folk, a clover will help you see them...A horse shoe hung like a u to catch goodluck, knocking on wood three times awakens the sleeping spirit to bring you blessings...tossing coin in a well while making a wish, along the same lines as wood...Never step into a house left foot first...it's the path of evil and you'll be letting it enter first...place a nail in the ground where someone was murdered, it'll hold their spirit still and prevent it from wondering around...

these are a few, most i practice...i'll come up with some more when i'm able to think of them...