The following article has been reproduced by kind permission of the author, Rick Newkirk. Rick is the founder and Head Coach of the St. Louis Comets AAU Girl's Basketball Club. I believe its Attitude. The ability to except situations and make them work in their favor.
Losers never seem to know why they lose.
They blame the referees for bad calls, the gym conditions, the court surface, their teammates, etc. Winners on the other hand play above the problems. With out a doubt, it is the six inches between your ears. Winning and losing comes down to who can stay focused. Great players never let their opponent or outside conditions control their game.