A picture is worth a thousand words
Don’t be afraid to gesture!
We all seem to have a hard time deciding what to do with our hands when we are speaking. Use them to help the listener “see” what you are saying. Make pictures with them. Use them to drive home a point.
Practice in front of a mirror until you are comfortable with the way your hands work with you. Don’t repeat any one gesture constantly or you will drive the audience crazy. Don’t keep your hands in your pockets, folded in front or behind your back, and don’t leave them hanging at your side for the duration of your presentation. Doing that makes you look like you either don’t care or you are nervous. Mix up your gestures. Move casually and gracefully. Use your hands to help you. When you speak slowly your hands can keep pace very nicely and will help you be a more powerful and professional presenter.