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 machines have no memory, so there is no effective way of outsmarting them. But there are some tips, which you can use as a basic strategy. Try to play slot machines that have the highest 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. Before playing decide how much you can spend this day. Once that limit is reached, go do something else. It is not wise to think that you will be a winner all the time. You will lose too. 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. Find a machine that suits your bank-roll. If you have little money you’d better paly dollar machines. Don't forget to cash out the credits you've accumulated. It may seem strange but some gamblers forget to do it. Never make high bets if you play slots you have never played before.

As you know there are different types of slot machines. And do you know that there are even types of slot palyers.
Persistent player.
This type of slots player is the one that believes the win is right around the corner. The machine can begin paying in any second.
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 believe that at least any payout is due to happen. 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 must pay.
In the old days when a payout occurred players would feel the coins to see if they were hot or cold. If the coins were hot they believed that the machine had not paid for a long period of time. The heat of the machines lights, etc would eventually heat the coins.
Chaser is the next type of slot players.
The player thinks that the machine he is going to play is not a machine that never pays. A sense of comfort exists between the slot machine and the player.

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

Casinos: Native American
Slot machines are forbidden 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
Slot machines aren't governed by any federal law. 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. "Class III" (or "traditional") slot machines operate independently from a centralized computer system. A player's chance of winning any payout is the same with every play. You can find Class III slots in Nevada or Atlantic City more frequently. They are sometimes referred to as "Vegas-style slots".
There is a connection between "Class II" slot machines ("video lottery terminals" or "VLTs") and a centralized computer system. The determination of the outcome of each wager is fulfilled by it. 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. Class II games are not so tightly regulated by the state.

Characteristics Of Class II Games
The players are playing against each other. Their competition is for a common prize. One player always wins the game. 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. One game is dependent on previous games. The player is an active participant of the game. The same set of numbers is played by all players.

Class III Game Characteristics
The player is playing against the house. There is no connection between the previous and the next games. Any game has any possible outcome.

Slot Clubs
In American casinos there are "slot clubs" the membership of wich is free. 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. The requirement of such clubs is the usage of cards for the slot machines. Comps or "cash back" from these clubs can make significant differences in the maximum theoretical returns.

Australia
One of the most popular Australian poker machine games is Queen of the Nile. Slot machines in Australia are officially termed Gaming Machines. In Australian-style gaming machines video displays are used to simulate physical reels. There are usually five of them. 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. The first Australian state to legalize this style of gambling was 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.

Slots In The United Kingdom
Fruit machines, one-armed bandits and AWP are the names for slot machines in Britain. There are fruit machines in pubs, clubs, arcades, and some take-away food shops. 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. The machine pays winnings if certain combinations of fruit appear. These machines and slot machines seen in casinos and elsewhere around the world are very similar. But there are some extra features. The jackpots from these machines are limited. The UK fruit machines have some features. There is an opportunity for a player to hold one or more reels before spinning. The chance of winning is sometimes increased. A finite number nudges following a spin can be also given to a player. A nudge is a single-step rotation of a reel of the player's choice.
The type and the location of the machine influences the maximum payout for an individual game. Private members' clubs are allowed "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 played in Europe and in countries such as the Czech Republic, Russia, and Ukraine.

Japan
Pachisuro is the name for Japanese slot machines. Their ancestor is the traditional Japanese pachinko game. Slot machines are new phenomenon. They can be found in mostly in pachinko parlors and the adult sections of amusement arcades, known as game centers.
Regulation of the machines is fulfilled by 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.