1. PRACTICE AND PREPARE!
The best way to beat anxiety is to prepare. Take time to go over your presentation several times. Once you are satisfied with the material, practice. Get a friend to evaluate your performance or videotape yourself.
2. KNOW YOUR AUDIENCE.
Your speech is about your listeners, not you. Learn all you can about your audience before crafting your message. Match your contents i.e. your choice of words, structure, and motivational message accordingly.