-- Smile before, during, and after your speech. This will project confidence, and your positive energy will be reciprocated by your audience.
-- Practice your speech. Then practice it again. Try to simulate the conditions in which you will give the speech as closely as possible.
-- Introduce yourself to members of the audience before you begin. That way, you will not feel as if you are speaking to complete strangers.
-- Before you start your speech, picture yourself delivering it perfectly and envision the audience’s enthusiastic applause.
-- Maintain eye contact with individual members of the audience as you speak. Focus your attention on each person for a few seconds at a time.
-- Use hand gestures purposefully. When you do gesture, be sure to use your entire arm, not just your hand. That way, your movements will seem confident and intentional.
Nothing improves a public speaker as much as experience. Practice with friends or family, or at your local Toastmasters chapter.