I probably spent the better part of a year on SatoshiDice back in the days. It IS possible to make money gambling. You just need to gamble with your head and not get into a death spiral when you start losing or try to endlessly martingale. The first choice you make is what game you play and if you can get a game that's not against the house like poker, then that's the top choice, otherwise you want games with minimal REAL house odds, blackjack, dice are second favorites.

Then you see where your luck takes you, that you have no control over, but you can control your BET SIZE and WHEN you want to bet which can further tilt things in your favor. In the end it's about trying to maximize your odds at the game and that it something you CAN control.