There is hardly any strategy that can be applied to slots. Never believe if somebody says that he has an incredible winning strategy. The slots don’t have memory, that’s why it is not wise to try to outwit them. But it is wise to play with useful tips, which can really help you. It doesn’t mean that you will win a lot of money, but you will not lose so much. Different slots have different payouts. So play slots with the higher payout. Play slots with the payout above 95%. When playing slots you must always know the odds and probabilities of the slot you are playing. There is a payout table for each slot, so make sure you read it before inserting coins. Determine your losing limit for the day. Stop playing when you reach this losing limit. When playing remember that you can win as well as lose. Try not to spend all of your time on a machine that isn't paying out. When things are going your way and you're on a lucky streak, take advantage of it and bet more. When you're slumping, bet less. Choose a slot according to your bankroll. If you have little money you’d better paly dollar machines. 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. Always play what you know.

I tis important to now what you are playing.
Only the correct amount of money should be inserted into a machine. Always cash out your credits before leaving a machine.
Slots shouldn't be a stress for you, just enjoy. You can increase your bets only when you are winning, and decrease your bets when you are losing.

You can be sure that slot machines are designed to be honest. However, in the past certain manufacturers have been caught using computer chips that cheat the customer.
When the first slots only appeared cheating was impossible because they worked mechanically, with independent wheels spinning and then stopping randomly. Modern slots are much different. There is a chip inside of every slot machine, this chip is programmed to select numbers randomly. The selected number determines the symbol which then comes out. The computer code that generates the random numbers is responsible for whether the machine is “loose” or “tight,” so gaming inspectors look at the machine’s code to make sure that a slot machine doesn’t cheat. There is a legal rate according to which the machine has to pay out. Of course it can pay lower, which happen very seldom.
Because slot machines don’t pay off with every spin, it’s difficult for customers to tell whether a slot machine’s chip has been programmed to pay off less often than is legally required. Before the machines are installed in casinos they are examined by inspectors. But you must understand that inspectors can’t examine every machine. They examine the brands. If inspectors approve the brand, they can produce machines, and change them. But these changes must cover legal requirements. Manufacturers can change chips to make a machine pay less as long as the inspectors have approved that particular chip.
There is an example when there was inserted an illegal tip which doesn’t allow royal flushes. Or a chip that shows near misses of a jackpot. The player would never hit a jackpot but keep on playing maximum bets. Don’t keep silent if you come across such slot machine. Be sure that inspectors will examine this very machine and the casino itself to make sure everything is ok. Manufacturers that cheat are fined or they can lose their license.