I can't think of a single superstition that I follow. I adore black cats, I've walked under many a ladder and broken my fair share of mirrors over the years. I have even opened an umbrella or two in the house!
All that, and I'm still here to talk about it, relatively unscathed.
I guess superstitions are fun for some and debilitating to others, but I have none that I believe in or make me alter my day.