RegularOwlJoined on 20 Mar 2012
Avoid making any awkward situations worse by apologizing or saying, "woops that was awkward, excuse me." Just keep going and forget about it.
If you're speaking informatively about something, try to act like a world class teacher when on the stage.
Try to get to know the room you'll be speaking in beforehand. For example test the microphone and other equipment if possible.
Practicing with a timer can help you gauge the speed at which you speak. Remember to take your time and avoid words like "um."
Remember who your audience is and at what level of understanding they're at as you prepare your presentation's content.
Don't read too long from your notes or your presentation slides as your voice needs to project towards the audience, not the floor or the wall.