When playing blackjack or any other casino game, you should establish a "stop-loss" method to your money management system. This is similar to a Wall Street stock investor. Say you bought a stock at $25 that moved up to $35. You tell your stock broker to sell if it drops back to $30. What you have done is put in a stop-loss order. Then if the stock does go down the broker will automatically sell at $30. You should do the same thing with your winnings. Weather it is blackjack, craps, roulette, or even slots, the same principle applies. For example, you are ahead with $500 after starting with $250 and you set a stop-loss at $400. If you start to lose you stop playing altogether at $400. This will allow you to leave with a profit instead of giving it all back to the house.