wow this could easily get out of hand.. i don't WANT to believe in them, but they've proved themselves over and over again.... (of course it could just be me, i am superstitious...)

pick a penny up tails up is bad luck
breaking a mirror is seven years bad luck (lol i got like 3 years left i guess?)
bragging or talking about something before it's actually happened is bad luck (i.e. yeah i'm picking up a 1/4 later tonight ~later that night~ no, =/ it never went through)
kind of the same as above, but a lil diffrent so it's in it's own.... saying something won't happen will almost automaticly make it happen (only works when you MEAN it... you can't say, a million dollars isn't gonna drop in my hands and expect it to work )
i guess it'd fall under superstition but it's actually my religious belief... do bad to others, and it will come back to you but 3x worse.. (that's not to say just cuz you have a rough life that you are entitled to giving others hell...)

again, htese have proved themselves to me time and time again.... especially the last... even if i'm having a shitty day, i do my best to not put that hell or take an attitude up with anyone else... lik ei said, just cuz you're having a shitty day don't give you the right to do it to someone else.... (karma) if you're trying to be nice just to have something nice to happen to you, it won't... if you do good, it WILL come back.... maybe not in the form you fore-saw it but if you step back and look, it has.. and maybe not that day, maybe even not that year... i go out of my way to help people... it's in my personality and i honestly believe, if i was a dick, i'd of had a much much harder life..