Any slide content should be there as a backdrop to your presentation, they are NOT your main content delivery mechanism, that is YOUR job. Sure, if you need to illustrate something then the focus will be on the slide but outside of this they should simply be a backdrop to your presentation. You need to engage the audience, keep it nicely paced and ideal light hearted where possible. Don't go over and over the same point, make emphasis where it's needed but don't labour things. NEVER read from slides, it's awful and shows someone who has no understanding of their message.
Most of all enjoy it.