If you catch a falling leaf on the first day of autumn you will not catch a cold all winter.
394
Placing a hat on the bed is, apparently, bad luck. (South Carolina)
9
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
It's bad luck to leave a house through a different door than the one used to come into it.
143
A single magpie is considered a sign of bad luck. A Guide to the Scientific Knowledge of Things Familiar recites an old proverb concerning the incidence of bad weather when magpies forage alone and a possible scientific explanation for this.
49
Pirates believed that piercing the ears with such precious metals as silver and gold improved one's eyesight.
131
Two people breaking a wishbone is said to lead to good luck for the person with the larger piece.
225
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