There is hardly any strategy that can be applied to slots. You will probably, of course, encounter someone who claims to have developed thefool-proof' slots strategy system but please, ignore such advice. The outcome of slots is accidental. The machines have no memory, so there is no effective way of outsmarting them. The strategy can be represented only by a number of tips. You should always be looking for the machines that have the highest payout. Try to find something above 95%. Like other casino games it is very important to know the odds and probabilities of the game you are playing, the same thing with slots. There is a payout table for each slot, so make sure you read it before inserting coins. Determine your losing limit for the day. Once that limit is reached, go do something else. When playing remember that you can win as well as lose. If you think that the machine you are playing will hardly pay anything out you’d better stop playing it. Don’t be afraid of making higher bets if you are on a lucky streak with this very machine. Make lower bets if you are slumping. Play the slot machines that your bankroll can afford. Look for a dollar machine, and have some fun. Cash out the credits you’ve won before leaving the slot machine you’ve been playing. It may seem strange but some gamblers forget to do it. Never make high bets if you play slots you have never played before.

You must know exactly the game you are playing.
Always make sure that you insert the correct amount of coins into a machine. Before leaving a machine cash out your credits.
Just have fun. Slots should be fun, not stressful. You can increase your bets only when you are winning, and decrease your bets when you are losing.