I'm not a terribly superstitious person when it comes to generic superstitions.
Don't let a black cat cross your path, Friday the 13th is bad luck, break a mirror and seven years of bad luck blah blah blah...
So yesterday was a Friday the 13th. So many posts on the facebook thing mentioned how even though it was Friday the 13th they were somehow still having a good day! It seems to me that the only ones who need to fear anything on a Friday the 13th are the Templar Knights, and since I'm not one of those, I guess it just doesn't matter.
I do have superstitions of course. But they are private ones and not really relevant to anyone else.