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
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
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
Before traveling a person should, apparently, sit on their luggage. (Russian)
117
Collect seven or nine different flowers on midsummer eve and place them under your pillow and it is said that you will dream of your future spouse. (Sweden)
463
An acorn should be carried to bring luck and ensure a long life.
115