As with any game of pure chance, there is no real effective strategic system for winning at 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 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. You should always be looking for the machines that have the highest payout. Try to find something 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. Stop playing when you reach this losing limit. It is not wise to think that you will be a winner all the time. You will lose too. Don’t think that machine will feel guilty if you insert a lot of coins and get nothing back. Try not to spend all of your time on a machine that isn't paying out. If the machine pays out good you’d better make higher bets. When you're slumping, bet less. Find a machine that suits your bank-roll. Look for a dollar machine, and have some fun. Sounds obvious, but a lot of people forget! Play the slots you know well.

There exist at least two types of slot players.
Persistent player.
This type of slots player is the one that believes the win is right around the corner. Just a second and the coins will be flying all over the casino!
Players become so persistent if they have already spent a lot of money for this slot and haven’t got anything or if they have found a slot machine that haven’t paid for a long period of time. They know the next big win, or any win is due to pay out. The rush is that if they leave after depositing so much money in the machine it will erupt and the payouts will be often and large. Makes sense if you have lost 0. 00 and have yet to win. The machine will pay any way.
Many years ago players have their own way of determining whether the machine has not paid out for a long period of time. They touch the coins to see whether they were cold or hot. If the coins were hot they believed that the machine had not paid for a long period of time. In fact the coins could be hot only because of the numerous lights that heated the coins.
Chaser is the next type of slot players.
A sense of comfort exists between the slot machine and the player.

Every casino game has its own rules, features and of course etiquette. Slots are not an exception here. Though slots are played by one person, still thinks which can and can’t be done during playing slots. The first piece of slot machine etiquette is to determine deal or not to deal with particular slot machine. It can be difficult for the solo slot player to save a machine when they go to the rest room or to get a drink, but there are signals that can be used to indicate that a machine is in play. If you hang a coin cup over the handle of the slot machine it will mean that this slot is in play by you. Placing the coin cup on the seat means the same. If you play in the casino that uses a cashless system you can just leave the jacket or one of your belongings on the seat. If you see any of these signals at a particular machine, be sure to respect the signal and move on to a free machine. The second etiquette rule concerns the card left by the previous player. This is an extremely common occurrence, and just about every slot player has either found an abandoned card, left a card in a machine, or both. The accepted way to deal with this situation is to place the player card on top of the slot machine where it can be easily seen and retrieved. Nowadays most casinos allow smoking while playing. Of course, others will hardly like it, so try to make as few inconveniences as possible. Tipping is another difficult issue for many slot players, and many people are unsure how much to tip the attendant that brings the winnings. For jackpots that require a hand payout, the customary tip is one half of one percent of the jackpot.

United States
In the United States the availability of slot machines is highly regulated by state governments. To regulate the possession and use of slot machines many states have established gaming control boards. Nevada is the only state that has no significant restrictions against slot machines. Slot machines are allowed only in hotel casinos operated in Atlantic City in New Jersey. There are states that allow slot machines only on licensed riverboats or permanently-anchored barges. In Delaware there are slot machines only at three horse tracks. There is State lottery commission to regulate them.

Native American Casinos
Slot machines are forbidden in Native American casinos located in reservations. When the tribe first reaches a pact with the state in which it is located it gets the permission to have them. A pact entitles the state to receive a fraction of the gross revenue from slot machines.

Classes Of Slots
No federal law governs slot machines. There is no universal classification for all states. There are states where the usage of slot machines in a casino or other gaming area is restricted. A centralized computer system operates "Class III" (or "traditional") slot machines. A player's chance of winning any payout is the same with every play. There are a lot of Class III slots in Nevada or Atlantic City. They are sometimes referred to as "Vegas-style slots".
"Class II" slot machines ("video lottery terminals" or "VLTs") are connected to a centralized computer system. The determination of the outcome of each wager is fulfilled by it. The chance of winning a series of limited prizes is equal for each machine. The casino pays a fee to the state for each Class III game. The regulations for Class II games are not so tight.

Characteristics Of Class II Games
The players are playing against each other. They are competing for a common prize. Each game has a winner. The game continues until there is a winner. There is a certain number of wins and losses in a given set of wins. The combimation that has already occurred cannot occur again until a new batch is initiated. The games are dependant on each other. The player must be an active participant. All players play from the same set of numbers as the numbers are announced.

Characteristics Of Class III Games
The house plays against the player. The previous games don't influence the following ones. Any possible outcome can occur in any game.

Slot Clubs
Many American casinos offer free memberships in "slot clubs". 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. These clubs require that players use cards to insert into the slot machines. Comps or "cash back" allows to make the differences in the maximum theoretical returns significant.

Australia
Queen of the Nile is a poker machine that is very popular in Australia. Gaming Machines is an official name for Australian slot machines. In Australian-style gaming machines video displays are used to simulate physical reels. There are five of them in most cases. The laws regulating the use of gaming machines in Australia are a matter for State governments.
Gaming machines are found in casinos as well as pubs and clubs in some states. New South Wales legalized this style of gambling first. In 1956 they were made legal in all registered clubs in the state.
In Western Australia only particular forms of gaming machine are used.

United Kingdom
Fruit machines, one-armed bandits and AWP are the names for slot machines in Britain. Pubs, clubs, arcades, and some take-away food shops have fruit machines. 3, 4 or 6 reels with around 16 or 24 fruit symbols printed around them can be found on the machines. 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. These games have lots of extra features. There exists a strict jackpot limit. The UK fruit machines have some features. A player may be given the opportunity to hold one or more reels before spinning. This can sometimes increase the chance of winning. A player may also be 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 influenced by the type and the location of the machine. Private members' clubs have "club machines". Their jackpots are higher and they are allowed to charge more per game.
These machines differ from American slot machines. The probability of getting the jackpot in each game is independent of any other game.
The AWP fruit machine is popular across Europe and in countries such as the Czech Republic, Russia, and Ukraine.

Japanese Slots
The term pachisuro is used to denote Japanese slot machines. They originate from the traditional Japanese pachinko game. Slot machines are a fairly new phenomenon. There are slot machines in pachinko parlors and the adult sections of amusement arcades, known as game centers.
IC chips regulate the machines. There are six different levels changing the odds of a "777". All machine varieties have certain rules and regulations.

Meet the man who beat the slots.
It is impossible to cheat the slot machine, but to improve the payout is possible. It was proved by a gambler whose name was Tommy Glenn Carmichael.
Carmichael, now 53, had a long history of inventing devices to cheat slot machines. His first device was a kind of a top-button joint. By the way, for this device he was sent to prison. Upon his release, he continued to work on the problem and to devise a better way to cheat the new slot machines. His next invention was a slider, a guitar wire. He inserted it into the machine, which released coins form the hopper.
Later, as slot machines became computer based, he had to invent a new tool. In some way he managed to fool the manufacture who showed him the inner construction of a slot machine. It was enough for Tommy. His new inventions was a light want that blinded the sensor of the slot machine and as a result got winnings. He sold these wands and could earn up to ,000 a day. Now he could afford the most expensive cars and several houses.
But as known good things can’t last forever. For Carmichael, they ended in front of a slot machine at Circus, where he was caught with the light wand when he tried to run from security. He was fined, but soon came back to the same business. By this time, authorities had tapped his phone and recorded conversations with other cheats who used his device. Three years’ probation and expropriation was the punishment. He has been banned from entering any casino.