Placing a hat on the bed is, apparently, bad luck. (South Carolina)
9
It's bad luck to leave a house through a different door than the one used to come into it.
143
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
An acorn at the window will keep lightning out
93
An acorn should be carried to bring luck and ensure a long life.
115
Two people breaking a wishbone is said to lead to good luck for the person with the larger piece.
225
Before traveling a person should, apparently, sit on their luggage. (Russian)
117
In Asia, the digit 4 never appears in any Nokia handset model number, because 4 is considered unlucky in many parts of Southeast/East Asia.
78