Breaking a mirror is said to bring bad luck for 7 years. To "undo" this, take the shards of glass and bury them underneath the moonlight. In ancient times, the mirror was said to be a window to the viewer's soul. If that mirror were to break, it would
Two people breaking a wishbone is said to lead to good luck for the person with the larger piece.
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)
Placing a hat on the bed is, apparently, bad luck. (South Carolina)
An acorn should be carried to bring luck and ensure a long life.
Before traveling a person should, apparently, sit on their luggage. (Russian)
Many believe that if all of the candles on a birthday cake are blown out with one breath, while making a silent wish, the wish will come true.
In some parts of England, rum is used to wash a baby's head for good luck.