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
Some motorcycle enthusiasts hang a biker's bell from a portion of their bike to protect themselves from evil road spirits.
64
Placing keys on a table is considered unlucky. (Sweden)
3
It's bad luck to leave a house through a different door than the one used to come into it.
143
Pirates believed that piercing the ears with such precious metals as silver and gold improved one's eyesight.
131
An acorn at the window will keep lightning out
93
The superstitious symbolism of a black cat crossing one's path is dependent upon culture: some cultures consider this a sign of impending bad luck, while some cultures consider this a sign of impending good luck.
75
If you catch a falling leaf on the first day of autumn you will not catch a cold all winter.
394