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 outcome of slots is accidental. The slots don’t have memory, that’s why it is not wise to try to outwit them. But there are some tips, which you can use as a basic strategy. Try to play slot machines that have the highest payout. You want to find anything 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. Before you start playing set for yourself a losing limit. Stop playing when you reach this losing limit. You will not be a winner every time you play. The machine will not feel bad if you spend a lot of money and don't get anything back. Give up the machine that isn’t paying out and is not going to. Don’t be afraid of making higher bets if you are on a lucky streak with this very machine. When you're slumping, bet less. Play the slot machines that your bankroll can afford. 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. Sounds obvious, but a lot of people forget! Always play what you know.

Know what you are playing.
Only the correct amount of money should be inserted into a machine. Cash your credits and only the leave the machine.
Slots shouldn't be a stress for you, just enjoy. If you feel lucky increase your bets and vice-versa.

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

Native American Casinos
There are no slot machines 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 Slot Machines
No federal law governs slot machines. Their classifications may vary from state to state. There are restrictions on the type of slot machines that can be used in a casino or other gaming area in some states. A centralized computer system operates "Class III" (or "traditional") slot machines. Every play has equal chances of winning any payout. Class III slots are most often seen in Nevada or Atlantic City. "Vegas-style slots" is another name for them.
There are "Class II" slot machines ("video lottery terminals" or "VLTs") which are connected to 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. A fee for each Class III game is paid by the casino 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. Each game has a winner. The game continues until there is a winner. 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. The games are dependant on each other. The player is an active participant of the game. There is the same set of numbers for all players.

Class III Game Characteristics
The house plays against the player. Each game is independent of previous games. There can be any possible outcome in any game.

Clubs Of Slot Players
Free memberships in "slot clubs" is offered by many American casinos. 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" allows to make the differences in the maximum theoretical returns significant.

Australia
Queen of the Nile is very popular in Australia. The term Gaming Machines is officially used to denote Australian slot machines. Physical reels are stimulated by video displays in Australian-style gaming machines. There are five of them in most cases. State governments regulate the use of gaming machines in Australia.
There are Gaming machines not only in casinos but also in pubs and clubs in some states. The first Australian state to legalize this style of gambling was New South Wales. In 1956 they were made legal in all registered clubs in the state.
In Western Australia only particular forms of gaming machine are used.

The UK
In Britain slot machines are known as fruit machines, one-armed bandits and AWP. Fruit machines are commonly found in pubs, clubs, arcades, and some take-away food shops. There can be 3, 4 or 6 reels with around 16 or 24 fruit symbols printed around them. These reels should be spun. The machine pays winnings if certain combinations of fruit appear. There is similarity between these machines and slot machines seen in casinos and elsewhere around the world. But some extra features can be found. However, the jackpots from these fruit machines are strictly limited. The UK fruit machines have some features. A player is given the opportunity to hold one or more reels before spinning. The chance of winning can sometimes be 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 to have "club machines". Their jackpots are higher and they are allowed to charge more per game.
These machines also operate in a different manner to American slot machines. The jackpot can be won in each game independently.
The AWP fruit machine is played in Europe and in countries such as the Czech Republic, Russia, and Ukraine.

Slots In Japan
Pachisuro is the name for Japanese slot machines. The traditional Japanese pachinko game is their ancestor. Slot machines have appeared recently. There are slot machines 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". Despite the many varieties of the machines, there are certain rules and regulations.