There are three main roulette betting strategies: Martingale betting system, D' Alembert betting system, Labouchere betting system.

Martingale betting system:
Among roulette systems, the Martingale betting system is the most famous one.  It is a standard negative progression method. For each bet you lose, it is doubled on the next bet so that, when you finally win, your earnings will return all your previous losses. With this roulette strategy, you will return to your original bet and begin again. In roulette the best types of bets to use with the Martingale roulette system are outside bets such as red or black, odd or even and the high or low bet.

D' Alembert betting system:
Another popular roulette strategy is the D’ Alembert betting system that allows you to step up your bets by a smaller increment when you lose and lessen them by the same number when you win. This roulette strategy bet cuts down the rate of the value of your bet because the progression is linear rather than exponential. It is also called a pyramid system. The main goal of this strategy is to gain as much profit as possible and at the same time being able to keep the profit safe from losses. This system is more profitable to games that involve even bets such as roulette. When a loss occurs, the next bet is doubled. This is done in order to recover what is lost in the previous round. With the D’ Alembert roulette system, one is able to play in a more systematic way.

Labouchere betting system:
It is another popular approach used in roulette and other casino games. It is also known as cancellation or positive progression system. In this betting system, a player writes down a sequence of numbers according to the size of the bet. The very first bet will be the sum of the first and last numbers in the sequence. If the bet wins, the two numbers are excluded from the sequence. The next bet will be the sum of the numbers that are now the first and last ones. If the bet wins, the player goes on excluding the numbers and when the whole sequence is completed the player starts all over again with the same line of numbers. Every time the player loses the bet he adds the number of his first bet to the end of the sequence.

To sum up, following are some important roulette strategies to win at roulette table:

1. Always choose European roulette wheel as it has lesser house advantage.
2. Seek out for “Surrender" or "En Prison" rules to reduce your losses if a zero appears on your spins.
3. Place your bets on even money bets.
4. Manage your bankroll by determining how much money you can afford to lose and when to call it quits.
5. Reserve a part of your profits and don’t play with that amount any longer.