I've just spent all day on a presentation course - how timely.
It sound like you are OK with the actually doing the presentation bit, so I'll concentrate on the content stuff.
Every presentation should have 5 parts. Intro, 3 points and summary.
Intro - this can be summarised as where you are going, how you are going to get there, and why you are going.
Give an overview of your presentation (not of the subject, but of the presentation), then you need a road map - just three bullet points which you will elaborate on later, then a hook - this can be the opportunity (eg: we have a great opprtunity to earnlots of money from this resource), a fear (if we don't promote it we will lose it), an analogy, a scare story, or anything else that give your audience a reason to sit up and listen.
Then you eleborate on your three points. In your visual aids have no more than 6 bullet points per page, with 6 words per point. Use these only as references to remind you what you want to say, and them what you said. Every page should then have a "strap line" which sums up the main message of that point.
Final page is the summary - you repeat your three straplines and summarise your message, if possible tying back to the hook.
Hope that helps - I was quite impressed by the course but haven't had a chance to put it into practice yet. I'm also incredibly impressed with myself for remebering so much