There are too many of them but fortunately, I don't believe in superstitious belief when we are in gambling.
If you have, then I will respect you on what you are. Because each of us has a different way and techniques or even strategy in gambling. We had different like and dislike. For me, this isn't superstitious but I don't like to gamble on Friday 13th, I'm scared on that number and day.

Believe in your self, if you feel that you are the lucky one on that day. Then, believe it and probably luck is on your side, not just a superstitious belief.