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Play the table minimum when you're new at a game. This amount will typically be about $5 and is a good place to start while you're getting comfortable learning the rules. Once you understand a game better, you can start increasing your bets to $10 and $20. The reason you lose so much money playing slots is because you can play them so quickly. Table games take more time, thus any money you lose will be lost more slowly. Even a nickel slot machine loses you about twice as much per hour as a $5 table game. So take a seat at a blackjack table, order a drink, and enjoy the slower pace. You can opt to sit out every other round to draw out your money as long as possible. Try using a system in which you change your next bet depending on how your previous bet worked out. For instance, increase your bet by 50% every time you win. Betting systems are meant to increase your chances of winning in the short term, but can not improve your odds long term. Another strategy is to double your bet each time you lose. Also, you can try betting a quarter or one half of your remaining chips each time you place a bet. Since no betting system can eliminate the house edge, temporary gains will always be balanced out with big losses eventually. Limit your usage of betting systems to a few rounds and walk away while you're ahead.
Start with a small bet. Play table games at a relaxed pace. Use a betting system. Use betting systems only for a few rounds.