Get distance from yourself. Creative thinking, develop new sound in your head. An artist must have many tools-like an actor with many moods. Ballad approach makes for a fine tuned engine. Remember what it looks like not feels like.
Feeling can lie.
Nerves can get best of us. This combined with shallow breathing can be real problem. Breath control discussed too much. Learn to control sound and breath will follow. For every complex thought there is a simple one that can replace the complex thought.