Are you the sucker playing 5000 or 20,000? For example two machines setting side-by-side one pays 5000 coins, and the other pays 20,000 for a jackpot. If you must play a slot, look for the ones with the highest payouts, and play maximum coins allowed.
BJ gives you the best odds, about a 1% edge over the house for single deck, double-split on anything, and allow surrender. Slots are a suckers game for those who do not know how to play table games.
Put your money in press the buttom, you have got it mastered.