Decide that today's success isn't measured only by big improvements. Look for the small victories you can create through quality effort, consistent execution, and good decisions.
During:
Notice every small success during practice. Acknowledge it, then move immediately to the next opportunity. Let small wins in practice build toward the big win in competition.
After:
Did today's MindRep help you? How did today's MindRep help you? Do you want to own it and make it a consistent part of your training?