Gesturing is an excellent way to channel nervous energy. When you move, you reduce your own stress. Also, the audience is obligated to follow your action. Try using your body to support your message. Speak louder than you usually do.
High volume conveys high energy.
Also, speaking louder can help with presentation anxiety. Focus on what you want to change about your presentation style. Instead, work on identifying your best qualities. Even professional speakers have trouble with jokes that hinge on the perfectly timed one-liner. Also, if you are nervous you will get even more nervous if no one laughs.