Go slow, stay awake, concentrate on what opportunities the machine gives you and you may well find that your gaming becomes more profitable. Casinos don't like to give money away for nothing, so before a progressive pays out a fortune it almost always takes in a fortune first. Of course, the chances of you landing a progressive jackpot are remote, but by picking the progressive with the largest jackpot you ensure that if you do win you'll have something serious to shout about. On the other hand, look out for the places where the machines will be programmed not to pay out frequently. Anywhere near a table game where the casino prefers not to distract high stakes players who are essentially their bread and butter patrons.
Many slot machines boast about their payout percentages.
This is a mistake which many people make. The truth is that a complete cycle of a slot machine can be as many as 8,000 or 10,000 individual spins, and it is on these complete cycles that percentages are most often based. Sometimes doing nothing can pay handsome rewards. That done, he moves onto the next machine on his list, and so on. My friend isn't a millionaire, but week after week he goes home with a profit.