My mantra is always, "Take a nap first, Matt! Then think." It's silly, but it works.
Let go. Let go of all the stress and drama in your life. It's not worth it, and your body is far too important - too precious - to be bothered by a simple psych-out. You will figure it all out eventually, so why make life more complicated?
Laughter is an important part of healthy living.
Nothing ever turns out the way we expect, good or bad.
A pie in the face is funny. Comedy gold.
I get butterflies just like everyone else. So I meditate for at least ten minutes before I perform. I breathe in and out slowly for ten minutes, and that literally helps me slow my heart rate and relax.