Again, it's all mechanical and luck. You have no control over the outcome. The best you can do is carefully select the best machines in the house with the highest advertised payback. What's advertised is legitimate but it may be only one machine in a row of machines. Take your time and watch machines before playing them.
Progressive machines have the largest winning potential.
Stay away from MegaBucks and Cool Millions. The lottery has better odds. In the brightest red I could find as a warning. Keno To my knowledge and that of many others, the jackpot has never been paid off in this game. It's a horrible game for the player.