Stop by Gamblers General Store on Main St and buy the Bob Dancer strategy card for Jacks or Better. Play only on JOB machines that pay 9/6 for fullhouse/flush. When you get some time, buy the software and practice at home before you play again. Be aware that if you play a different game than JOB, the optimum strategy is different. Likewise for machines with "short pay" schedules... you must take that into acccount to maximize your chance of winning.