[rwalling]

I think I have.

Seth Godin talks about it as doing the opposite of what your lizard brain is telling you to do.

Stephen Pressfield calls it the resistance and talks about how you conquer it.

But whatever you call it, I've found that I've made the huge leaps in my professional life when I've conquered the fear (of blogging, public speaking, podcasting, launching apps, etc) and succeeded at something that really scared me.