Have a plan for when to stop. Some when they've doubled their session bankroll. Whatever your break-point, it's important to have one and stick to it. Otherwise you'll just keep playing until you can't and by then you'll have lost all the money you won. Forget the pot of gold, take the fistful of dollars.
Greedy players make big losers.
Casinos do not depend on luck to stay in business. On virtually every bet you make in whatever game you play, the house's win is designed right into the rules of the game. And that edge generally means they'll be the winner a lot more often than you will be. Sites like ours are a good place to start your education, but never forget that the casinos rule the roost and are in business to take your money. Unless you're a professional player with a proven track record, you're playing for the pleasure of it.