I don't believe in superstitions, but I still do certain things out of fun. Like making a wish if you see a shooting star, if the numbers on the clock line up (e.g., 5:55), etc. But only the wish related ones because they're fun. They don't really work, but they're fun. I've walked under a ladder before (I was careful), I've broken several mirrors (I'm clumsy), had black cats cross my path, etc. and nothing horrible's ever happened to me. :shrug:
Remember back when people used to send chain letters? Back before we had internet and could just do forwards instead?