I was about to perform a song with my ukulele, singing and rapping in front of my college class. I kept saying how nervous I was and my professor said, "My high school choir teacher said you have two reasons to be nervous. Either you're unprepared or you think too highly of yourself". Oof, so good. I think about this anytime I'm nervous, 10 years later.
I've received many more, but this one I call to mind most. I would love to hear any of yours?