Hall of Fame
I started this a while ago and it seems to work well for me. Before the match I think that my opponent has spent money to play, put time into practice and spends time to play the match. Therefore I owe it to him to give my full effort and give him a good competitive match. This helps me relax because as long as I feel I did my best effort I will be satisfied in a way even if I lose because I lived up to the expectations I believe my opponent had before the match. If I win even better of course.