The curse of Macbeth. William Shakespeare's shortest and bloodiest. Every actor or theater person will tell you it is extremely bad luck to utter the "M" word under the roof of a playhouse. Here is a little history if you are interested.
http://home.flash.net/~manniac/macb.htm

The Superstition:
If you should find a penny face up, pick it up for a day of luck.
If you should find it face down, leave it lay on the ground.

In poker, the most unlucky card you can hold in your hand is the Four of Clubs, even if it is teamed up with another 4.

Superstition can be seen here

"Never give a knife as a housewarming present, or your new neighbor will become an enemy."

Ref: http://www.oldsuperstitions.com/

Black and White and Red all over.

I've learnt a lot from this contest.
Eg. An itchy nose indicates -
a. You're going to quarrel with someone.
b. You're going to be kissed by a fool
c. Right nostril - a female visitor.
d. Left nostril - a male visitor.
Or it might just mean that your nose needs to be scratched!

I begged my friend not to deliberately cross her eyes as if the wind changed, she would remain like that forever.