Once a wedding ring has been placed on the finger, it is considered bad luck to remove it.
117
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
Before traveling a person should, apparently, sit on their luggage. (Russian)
117
In some parts of England, rum is used to wash a baby's head for good luck.
71
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
It is bad luck to put new shoes on a bed (or a table) (comes from the tradition of dressing a corpse in new clothes and shoes and laying them out so everyone can give their respects) - (UK)
57
An acorn at the window will keep lightning out
93