Use little text. Think "Twitter-sized."
(This will help you be less nervous.)
Time yourself to build confidence in what you plan to say and ensure that you have properly organized your presentation.
Speak clearly. Enunciate, no mumbling!
Dress like you're going to a job interview; wear your Sunday best. No Jeans and sunglasses.
Make eye contact with your audience
Engage the audience
Do NOT read from the slides.