Eye contact
Never lose eye contact with your audience and avoid focusing on any one particular person or section of the audience.

Enthuse life
Enthuse life in your presentation by make appropriate gestures, walking around rather than standing or sitting in one place. Change the intonations in your voice. Do remember, overdoing these actions could also be irritating to the audience.

Add humor
Add some anecdotes and humorous touches to your presentation. But adapt some seriousness if your presentation is solemn. Go with the mood of the presentation but also keep in mind the age group and the type of audience you are addressing.

Remain calm
Above all, remain calm even if you are nervous. You are an actor here, so keep in mind that there are no cues.

Keep time for questions
Fix an appropriate time for questions. Don't get emotional if any question is sensitive, or flare up if it is provocative. Don't get flustered if you can't answer a question, tell them that you would get back after some more research.

Back to the beginning
After the question and answer session, briefly run over your entire presentation. Don't forget throughout the presentation that you know more than the audience does (that's why you are at the pulpit). And if the audience is wiser by the end of your presentation, you know that those friends, Romans and countrymen did lend you their ears.