I think superstitions are terrible for a pool player. It just complicates the mental side of the game, IMO. I used to have this superstition about which side of the table my coin was on. I have no idea why I had to be on a certain side of the table, but I eventually realized how ridiculous that is. If you convince yourself that luck can be controlled by stupid things like that, it's going to do nothing but hurt your game. My advice is to do everything wrong, force yourself to. If your superstition that you have to call tails for every flip, call heads every time. Force your mind to get rid of all that garbage, it will help in the long run.