Delivery is the art of using voice and body to perform a rhetorical discourse. For example, a speaker's use of posture, gesture, eye contact, facial expression, clothing, tone of voice, and even odors can communicate meanings to the audience. The key to effective delivery is to keep it natural, relaxed, and consistent with your language. Try not to look stiff; at the same time, try not to look too dramatic. Non-verbal communication should not draw attention to themselves and away from the ideas. They should be used to clarify or reinforce verbal messages and, be suited to the audience and occasion.