Well here's something...

Black Cats - In ancient Egypt, the Goddess Bast was a black, female cat. Christians, wanting to rid society of all traces of other religions, convinced the ignorant that black cats were demons in disguise and should thus be destroyed. In the process, they also destroyed the kindly ladies who cared for the cats, believing them to be witches. Being demons, a black cat crossing your path would create a barrier of evil, cutting you off from God and blocking the entrance to heaven.

Walking under a ladder - A leaning ladder forms a triangle with the wall and ground. Triangles represent the Holy Trinity, and violating the Trinity by breaking it (walking through it) would put you in league with the devil himself. It is bad luck unless you cross your fingers whilst walking under it.

Breaking a mirror means 7 years of bad luck, unless you take the pieces outside & bury them in moonlight. Also, an undisturbed mirror in a house suddenly fall & smashes then it means that there will soon be a death. It is also extremely unlucky to receive a mirror as a present.

http://www.oldsuperstitions.com/bad_luck.html

The fun!