Practice

Practice, makes you appear perfect.
Watch this short clip–>www.youtube.com/watch?v=QLT5hmKZ3A0
Trust me when I tell you that speaking in public is not that easy to do especially if certain things aren’t in place, such as you having knowledge of the topic, and being able to keep your nerves under control. The are many people who would have furthered their career, much sooner and much faster had they been able to overcome their fear of speaking.
Practice is the first step to getting better at anything, but believe it or not some people have such a fear of speaking that they won’t even feel comfortable in front of a small audience of 10 or 20 people. Now it’s okay that you don’t feel comfortable, just keep doing it and you will get better, that’s the way it works. Practice
http://amazon.com/author/larrydjames