You're about to go on, the stage is set, you have the routine practiced, prepared, and mastered. You go on, lights glaring, the crowd goes silent. You stand there and begin, you know your act, yet for some reason, you question every move you make, "Did I do that right?, What's next? Will they like it?" That would be one example of overthinking your performance, overthinking something that you probably already know by heart.
Here's the low down, the effects of overthinking your performance.