Have you ever allowed your eyelids to droop at a conference, made jarring gestures in a board meeting, delivered an address with poor vocal quality... and not even been aware of it? The way you communicate nonverbally is responsible for 90 percent of what people think of you. It's the difference between being considered weak or powerful, unsure or confident, insecure or ready to take on the world. Knowing exactly what to look for in your own gestures and vocal intonations will help you communicate a powerful message with confidence and an assured presence.