The $20 roulette strategy, otherwise known as the Martingale Strategy is an almost guaranteed way to make sure you win at the casino with $20.

Play games that have low minimum bets and high returns, like video poker, blackjack, slots, and baccarat. Opt into promo offers when you sign up or deposit into an online casino for free cash to gamble with. Place minimum bets so you don't burn through your money.