Blair Singer delivers a short motivational monologue for trainers and speakers diagnosing that the true fear behind stage fright is worry about not being good enough or relevant to the audience. He prescribes shifting focus from oneself to serving the audience—acting as a facilitator who asks questions and pulls information—so speakers become more effective and lose stage fright.
The real fear is not public speaking. That's not the real fear. The real fear is that you're not going to be good enough, that you're not going to get the point across, that they're not going to think that you're relevant enough to them. So here's a cure. The cure is stop worrying about you. Worry about them. Be service oriented. What can I do for them? How can I help them? What's going on for them? That's why it's so much better to be a facilitator than a speaker. A facilitator asks questions and pulls information from groups and then uses that information to then help deliver what the audience wants, as opposed to just driving information across to people. So rather than worrying about you, by the way, this is why most people have stage fright. Because you're more concerned about yourself than you are the people in the room. Be concerned about them. How do I serve them? Keep your focus on them. Then you don't have to worry about not being good enough. You'll be more than good enough.