The smartest way is to set yourself an amount that you can afford to lose. $50/month? That can get you a lot of gambling action on low stakes at PokerStars or even micro betting with Bitcoin on the various game websites they have. You could buy into a lot of tournaments and things like that. That's the real smart way, and maybe after time you see that you get good at playing the game and don't need to deposit anymore and can just grow your money.