Two people breaking a wishbone is said to lead to good luck for the person with the larger piece.
225
Placing a hat on the bed is, apparently, bad luck. (South Carolina)
9
Before traveling a person should, apparently, sit on their luggage. (Russian)
117
It's bad luck to leave a house through a different door than the one used to come into it.
143
If you catch a falling leaf on the first day of autumn you will not catch a cold all winter.
394
In some parts of England, rum is used to wash a baby's head for good luck.
71
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
Amber beads, worn as a necklace, can protect against illness or cure colds.
89