As with any game of pure chance, there is no real effective strategic system for winning at slots. Never believe if somebody says that he has an incredible winning strategy. The slots are casual, there is nothing that can influence the outcome of the game. The machines have no memory, so there is no effective way of outsmarting 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. Try to play slot machines that have the highest payout. Play slots with the payout above 95%. Similar to other casino games, it is crucial to know the odds and probabilities of the machine you're playing. There is a payout table for each slot, so make sure you read it before inserting coins. Before playing decide how much you can spend this day. Once that limit is reached, go do something else. When playing remember that you can win as well as lose. Don’t think that machine will feel guilty if you insert a lot of coins and get nothing back. Give up the machine that isn’t paying out and is not going to. If the machine pays out good you’d better make higher bets. When you're slumping, bet less. Play the slot machines that your bankroll can afford. Look for a dollar machine, and have some fun. Don't forget to cash out the credits you've accumulated. 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.
You should know exactly how many coins you are supposed to insert into a machine. Before leaving a machine cash out your credits.
Slots shouldn't be a stress for you, just enjoy. Be smart and change oyur bets according to your luck.

It is true that slots are designed to be honest and not to deceive a player. However, in the past certain manufacturers have been caught using computer chips that cheat the customer.
In the old days, slot machines worked mechanically, with independent wheels spinning until they each stopped randomly. Modern slots are much different. There is a chip inside of every slot machine, this chip is programmed to select numbers randomly. The numbers the computer selects correspond to the symbols that appear on the slot machine’s screen. 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. The machine has to pay out either to the legal rate or better. Of course the latter happens 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. In the case of the approval of the brand the manufactures can produce the slot machines, even change them if it doesn’t go out legal bounds. Using their right to produce slot machines they insert different chips, which makes the machine pay less.
For example, the Nevada Gaming Commission caught American Coin using chips that did not allow poker royal flushes. Or a chip that shows near misses of a jackpot. One the one hand the machine would never have a jackpot and the player would keep on playing. If you think that you have come across such a machine you have a right to complain. 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.