What is the gain of gambling if not the winning, to win you must first win in your head and your luck will bring the cash in.
A nice outlook on getting a positive vibes in order to win but as beautiful as it is, we all know that positive mindset will never affect the result of the game since we all agree that many games results are random and by chance. The Law of attraction does not work on gambling IMO, like positive magnets positive things, it can be applied to real life but not in gambling for the same reason I stated about it.
Sometimes fortune also smiles on the positive, at least if positivity does not add anything to the outcome of the game, it can help prepare us for the result being able to accept whatever result and the outcome of our bets.
But then we must separate the place of feelings from gambling since its outcome does not rely on emotion but a systematically calculated probably fair system that is designed to favour the house.