Before first bet i don't have much of a ritual but if I play many and lose and want the next one to win I look away from the screen before the result comes and then look back once it's happened. Also sometimes if I have had a long losing streak I pretend I want the opposite result. So if I bet Odd on roulette and I want it to win as I lost a few spins before, I'll say "come on Even!" and pretend I want even to win, to try to trick luck, dumb i know, but that's my ritual. I usually only do these dumb rituals when losing.