Placing keys on a table is considered unlucky. (Sweden)
3
If one walks underneath an open ladder it is said to bring bad luck. Sometimes it is said that this can be undone by immediately walking backwards back underneath the ladder.
105
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
Placing a hat on the bed is, apparently, bad luck. (South Carolina)
9
Pirates believed that piercing the ears with such precious metals as silver and gold improved one's eyesight.
131
Before traveling a person should, apparently, sit on their luggage. (Russian)
117
An acorn at the window will keep lightning out
93