It's bad luck to leave a house through a different door than the one used to come into it.
143
If you catch a falling leaf on the first day of autumn you will not catch a cold all winter.
394
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
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
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.
105
Pirates believed that piercing the ears with such precious metals as silver and gold improved one's eyesight.
131
In some parts of England, rum is used to wash a baby's head for good luck.
71
An acorn at the window will keep lightning out
93