Amber beads, worn as a necklace, can protect against illness or cure colds.
An acorn at the window will keep lightning out
Placing a hat on the bed is, apparently, bad luck. (South Carolina)
Once a wedding ring has been placed on the finger, it is considered bad luck to remove it.
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.
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.
According to an age old custom, carrying a dead shrew in your pocket wards off rheumatism!
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)