i'm a great believer in Karma
what goes around comes around. Proof is that i have one particular friend, who is honestly one of the nicest guys you could meet. Nobody has a bad word to say about him and ive never seen him angry. He plays the slot machines not because he needs the money, but just because he enjoys sticking a few £ in every now and again. He wins every single time almost. Quite often wins jackpots of £50 etc.. only putting £1 in.
Moral of the story is, do good deeds to others, and you'll be surprised what luck comes your way.