I just set my expectations low and understand that the preferred result isn't always going to be the actual result.
Pressure is (mostly) created by the self, not by others.
I don't dwell about missing a shot or shape, it happens.
And, imo, once you learn how to accept ALL results in a logical manner, you will be able to reach your greatest potential.
Albin Ouschan is a prime example of this.
He learned to control his emotions and now plays at a consistently high level. He doesn't always win, but his emotional control gives him the greatest opportunity to succeed.