There is no real easy way because its depending on how much luck you are having on a certain time.
Another thing is the game you are playing I think the easiest game that is more based on tactics is poker itself.
The easiest way to win with gambling is by betting on sports games because then you can turn the odds in to your favor so that the chance of winning will be bigger then with other gambling games.
So I suggest that you do this it really works no jokes.