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
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
According to an age old custom, carrying a dead shrew in your pocket wards off rheumatism!
24
Two people breaking a wishbone is said to lead to good luck for the person with the larger piece.
225
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 should be carried to bring luck and ensure a long life.
115
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