Craig Valentine offers 10 simple guidelines for adding impact to your speech. Included are:
1. Don’t move all the time. If you are always moving then no movement will be meaningful. Your audience will never know what’s most important. Move with a purpose. When there is no reason to move, don’t.
6. Don’t use the same gesture over and over again. This is evidence of a habit and most likely distracts from your presentation.
Read the full list with more details and audio-examples here.