You've been asked to do the presentation because you are the expert on your business. You know your subject. In fact, you know it better than anyone in the audience. Watch their expressions. Involve them in your presentation.
People retain interest at a much higher level when they are actively involved in a discussion.
Do not rely on notes. You need to be looking at your audience, not at your notes. It's okay to have a couple of 3 x 5 cards with a few sentences to jog your memory, but, remember you can't look at your audience, and notes at the same time. And it's a good deal more important to make eye contact with your audience. As soon as you hear about the opportunity to present, prepare a rough first draft .Create at least two or three additional drafts until you're comfortable, if not wildly in love, with your presentation.