Understand the difference before practice begins. Give-up self-talk causes you to quit trying. Fire-up self-talk keeps you fighting.
During:
If negative self-talk appears, ask yourself whether it's making you quit or compete harder. Eliminate give-up talk immediately and keep any self-talk directed toward continued effort.
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?