Breathe deeply before speaking to help the jitters go away.
Look at your audience so you can tell if they are interested in what you are saying.
Attend to your stance by placing your feet forward directly under your shoulders.
Speak loudly and clearly so people in the back of the room can hear you.
Talk with your hands to describe what you are saying.
Memorize key points not your whole talk, which allows you to have a conversation.
Anticipate questions and think of answers before your present.
Provide a list of your points so your audience knows what you will be telling them.
Source: http://www.nofreakingspeaking.com/help-your-kids-and-yourself-deliver-great-presentations/