As humans, we are conditioned to look for patterns in life and we gamblers try to make predictions based on what we see, while we are gambling. The reality is that these patterns does not exist, but we like to pretend that they do because it helps us to bring order to the chaos that are gambling. 
Some people seem to think that your bet size will increase your chances to win, but that is simply a myth. The reality is that it simply means your payouts will be bigger when you do win.
To be honest, I don't trust gambling, but I like to gamble in football, because this is a sport that I like and has its own challenges when placing bets on certain clubs. In the slot gambling case there is no pattern that I see to be used as a reference for gamblers, because the available format is only spin and increase the number of bets.Some people seem to think that your bet size will increase your chances to win, but that is simply a myth. The reality is that it simply means your payouts will be bigger when you do win.
Poker is also one of the interesting gambling compared to the slot, but I can understand everyone has different tastes, as far as I know there is no specific formula in gambling because we often rely on instinct and hope for luck.