Two people breaking a wishbone is said to lead to good luck for the person with the larger piece.
225
An acorn should be carried to bring luck and ensure a long life.
115
It's bad luck to leave a house through a different door than the one used to come into it.
143
It is bad luck to put new shoes on a bed (or a table) (comes from the tradition of dressing a corpse in new clothes and shoes and laying them out so everyone can give their respects) - (UK)
57
Once a wedding ring has been placed on the finger, it is considered bad luck to remove it.
117
When you speak of bad luck, it is said that one should always knock on wood. Also knocking when speaking of good luck apparently helps with having good luck. This is an old Celtic tradition related to belief of wood spirits.
208
Pirates believed that piercing the ears with such precious metals as silver and gold improved one's eyesight.
131
Placing a hat on the bed is, apparently, bad luck. (South Carolina)
9