Common roulette strategies, like the Martingale and Fibonacci systems, help players manage bets and improve winning chances. The Martingale involves doubling bets after losses to recover them, while the Fibonacci system uses a sequence based on the Fibonacci numbers to increment bets after losses. Although these strategies provide a structured way to bet, they do not alter the house edge, and luck remains a major factor. They can assist with bankroll management and enhance game enjoyment, but they do not ensure success.