The foundation of winning at Blackjack is to utilize proper basic strategy in playing the hands. "Proper" means that each decision you make on hitting, standing, doubling or splitting pairs is the correct mathematical play for that hand. There is no room for intuition, gut feelings or guessing when it comes to basic strategy; you must make the "percentage" play each time. Even if you've doubled an 11 against a dealer's 10 five times in a row and lost, when that hand comes up a sixth time you must double. Consistency is a big part of playing a winning game, so resolve right now that you are going to make the proper play, regardless if the dealer rolls his eyes upward or the other players at the table groan quietly when you do it.