John; on your way to the game think abt what your weakest thing you do when you are on the court. And when you have a blow out, that will give you time to work on that.
I think we all loose focus, but i do what the other guy said sometimes i talk, sometimes i listen to the crowd, they will always keep you focused.
Or if it get so bad make the wrong call against the loosing coach you will wake up real quick

because he will be on you for the rest of the game and it will be your fault why they lost by 20+.