It's bad luck to leave a house through a different door than the one used to come into it.
143
Placing a hat on the bed is, apparently, bad luck. (South Carolina)
9
According to an age old custom, carrying a dead shrew in your pocket wards off rheumatism!
24
There are numerous sailors' superstitions, such as: it is considered bad luck for a ship to set sail on a Friday, to bring anything blue aboard, to stick a knife into the deck, to leave a hatch cover upside-down, to say "pig", or to eat walnuts aboard.
70
Some motorcycle enthusiasts hang a biker's bell from a portion of their bike to protect themselves from evil road spirits.
64
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
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
Pirates believed that piercing the ears with such precious metals as silver and gold improved one's eyesight.
131