To increase your chances of winning on slot machines, start by choosing games with higher payout percentages, typically above 95%. Set a budget and stick to it, ensuring you only play with money you can afford to lose. Take advantage of bonuses and promotions offered by casinos, as these can extend your playtime. Opt for machines with lower volatility for more frequent, smaller wins, or higher volatility for the chance of larger payouts. Finally, know when to walk away; quitting while you're ahead can help you preserve your winnings.