•Open body. Use an open body as oppose to a closed body. Closed body is a defensive stance. Crossing your arms or your legs put you into a defensive mode which is not what you want when presenting. Show your palms and hands. •Relaxed. Appear relaxed and calm. Your relaxation will be taken as a sign of confidence in your message and you are much more likely to be listened to and you have a better chance of convincing people. •Hand movements. Emphasise your message with your hands •Walk around, use the space. Don’t stay in one place. Use the area effectively. Movement keeps the audience engaged and attentive. Of course, make sure you don’t move so much as to distract.
Look good. Your cloth should show the correct authority required for your content. If you are giving a business presentation you need a suit or smart cloth. If you are giving a talk to an academic crowd, smart-casual may be more suitable. In short, dress not to distract, but to emphasise your message, whatever that may be.