Superstition.

1=if you break a mirror you get bad luck for 7 years.
2=spilling salt is bad luck unless you throw a little over your left shoulder.
3=if you meet someone wearing a red tie they will take something from you.
4=if you wear red socks you will win money.
5=a rabbits foot is very lucky.
6=number 8 is the most popular lucky number in the world.
7=number 13 is unlucky for most people.
8=black cat crosses your path is lucky.
9=never fall in a graveyard or you will be in it for good within a year.
10=make a wish upon a star and it will come true.