Once a wedding ring has been placed on the finger, it is considered bad luck to remove it.
117
Before traveling a person should, apparently, sit on their luggage. (Russian)
117
Placing keys on a table is considered unlucky. (Sweden)
3
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
Opening an umbrella indoors is said to result in 21 days of bad luck. Some traditions hold that it is only bad luck if the umbrella is placed over the head of someone while indoors.
75
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
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