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 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. Try to play slot 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. Stop playing when you reach this losing limit. You will not be a winner every time you play. Don’t think that machine will feel guilty if you insert a lot of coins and get nothing back. 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. Don't forget to cash out the credits you've accumulated. Sounds obvious, but a lot of people forget! Try to play the slots or games you have played before.

Here is the list of the most amusing myths concerning slots.
You can spot a winning slot machine.
The only way you'll spot a winning slot machine is when the bells are ringing and the money is dropping. RNG is the main element of every slot machine and one never knows what combination it will form.
Casinos place loose slots near the cashier, aisle ways, etc.
In reality it is not to casino’s advantage to place loose slots at one and the same place, because in this case gamblers would play only these slots. The slots are mixed and nobody can say for sure whether this slot is a loose one or not.
Count the number of symbols on the reels to determine your odds.
This is mathematically impossible, remember the RNG (random number generator) determines the stops. Thereare literally millions of combinations on a 3 reel slot machine, so there is no way of determining odds by the symbols on the reels alone.
Casinos can tighten or loosen slot machines from the back office.
It is not as simple as that. The casino can’t just change the chip of the slot machine. It is illegal and it has to be permitted by the commission.
A slot machine that has not been paying is due to hit.
Absolutely false. The RNG assures this. You have an equal chance of winning on a losing machine as you do on a machine that just paid out the jackpot.
Pulling the slot machine handle produces more wins than pressing the spin button and visa versa.
It is also a mistake. These things are only mechanisms for beginning the game. The machine knows whether you win or lose before the symbols begin to stop.
Playing with hot coins improves your chances.
It is false. Nothing can affect the outcome, the machine doesn’t care and doesn’t know whether your coins are cold or hot.
Casinos set slot machines to payback more on the weekends.
One more rude mistake. The chances and odds are always the same. It doesn’t matter when you play.

United States
In the United States the availability of slot machines is highly regulated by state governments. There are a lot of states that have established gaming control boards to regulate the possession and use of slot machines. There are no significant restrictions against slot machines in Nevada. In New Jersey slot machines are allowed only in hotel casinos operated in Atlantic City. Only licensed riverboats or permanently-anchored barges are allowed to have slot machines in some states. Delaware allows slot machines at three horse tracks. State lottery commission exists for their regulating.

Native American Casinos
There are no slot machines in Native American casinos located in reservations. It is permitted when the tribe first reaches a pact with the state in which it is located. Typically, a pact entitles the state to receive a fraction of the gross revenue from slot machines.

Classes Of Slot Machines
There is no federal law governing slot machines. There is no universal classification for all states. Some states have restrictions on the type of slot machines that can be used in a casino or other gaming area. The operation of "Class III" (or "traditional") slot machines is fulfilled from a centralized computer system. Every play has equal chances of winning any payout. You can find Class III slots in Nevada or Atlantic City more frequently. The term "Vegas-style slots" is iften used to denote them.
A centralized computer system is connected to "Class II" slot machines ("video lottery terminals" or "VLTs"). It determines the outcome of each wager. Each machine has an equal chance of winning a series of limited prizes. There is a fee for each Class III game that the casino has to pay to the state. There are no tight regulations for Class II games.

Characteristics Of Class II Games
The player is playing not against the casino but against other players. They are competing for a common prize. One player always wins the game. The game is continued until someone wins. A given set has a certain number of wins and losses. Once a certain combination has occurred it cannot occur again until a new batch is initiated. There is a dependence of between the games. The player must be an active participant. There is the same set of numbers for all players.

Characteristics Of Class III Games
The player is playing against the house. Each game is independent of previous games. Any game has any possible outcome.

Slot Clubs
There is free memberships in "slot clubs" in many casinos of America. Complimentary food, drinks, hotel rooms, or merchandise are called comps and this is the way a small fraction of the amount of money that is bet is returned to the players. A member of such club should use cards to insert into the slot machines. Comps or "cash back" from these clubs can make significant differences in the maximum theoretical returns.

Australia
Queen of the Nile (manufactured by Aristocrat) is one of the most popular Australian poker machine games. The term Gaming Machines is officially used to denote Australian slot machines. Australian-style gaming machines frequently use video displays to simulate physical reels. There are five of them in most cases. The use of gaming machines in Australia is regulated by the laws.
Not only casinos but also pubs and clubs in some states have Gaming machines. This style of gambling was legalized first in New South Wales. The year of 1956 was the year of their legalization in all registered clubs in the state.
The usage of particular forms of gaming machine is allowed in Western Australia.

The UK
In Britain slot machines are known as fruit machines, one-armed bandits and AWP. Pubs, clubs, arcades, and some take-away food shops have fruit machines. These machines commonly have 3, but can be found with 4 or 6 reels with around 16 or 24 fruit symbols printed around them. These reels should be spun. Winnings are paid from the machine if certain combinations of fruit appear. There is similarity between these machines and slot machines seen in casinos and elsewhere around the world. But there are some extra features. The jackpots from these machines are limited. The UK fruit machines have some features. A player can hold one or more reels before spinning. This can sometimes increase the chance of winning. A player is also given a finite number nudges following a spin. A nudge is a single-step rotation of a reel of the player's choice.
The maximum payout for an individual game is different depending on the type and the location of the machine. There are "club machines" in private members' clubs. They have higher jackpots and are allowed to charge more per game.
These machines also operate in a different manner to American slot machines. The probability of getting the jackpot in each game is independent of any other game.
The AWP fruit machine is played in Europe and in countries such as the Czech Republic, Russia, and Ukraine.

Slots In Japan
Pachisuro are Japanese slot machines. The traditional Japanese pachinko game is their ancestor. Slot machines have appeared recently. Pachinko parlors and the adult sections of amusement arcades, known as game centers have them.
The machines are regulated with IC chips. They have six different levels changing the odds of a "777". There are certain rules and regulations in spite of the many varieties of the machines.