Play the maximum bet:
Another helpful tip is to bet the maximum number of coins per spin. That's because in order to hit the jackpot on some of the progressive machines, you need to place a maximum bet. If you match all the right symbols, you'll win a smaller amount if you bet less.

Stop while you're ahead:
Be sure to set a limit for yourself and to stop playing once you hit it. Just because you're putting money into a machine doesn't mean you're going to win or that you're guaranteed a large payout. Stop while you're ahead if you're winning. The more times you try to win back your money will usually end up costing you all of your earnings and force you to spend more money.

Double jackpots:
The double jackpot symbols can be very lucky. They can help double or even triple the payout and they can replace any symbol. They're usually red, white and blue sevens or even double and triple diamonds.

Play the single pay line:
Although the multi pay line machines have higher odds, these machines usually have larger payouts than the multi pay line ones.