Another recent thread reminded me of this subject and I hadn't seen it posted before. I figured a lot of people have superstitions, perhaps even ones they don't even notice. I don't have any really strange ones other than making sure I wear the same jersey/apparel when I watch my favorite sports teams play on TV, even if I'm watching it by myself. I'm convinced it brings luck and increases the chances of my team winning.
I'll probably remember more as I read other people's input.