Make sure you know all of the information on each slide so you don't have to look over your shoulder. It might help to have some note cards at hand, so the text on each slide is right there in front of you.

Visual aids are there to help you make your points and to help the audience understand the information.

If you aren't reading your PowerPoint slides and they follow the guidelines in " Preparing Your Visual Aids" this part of the speech should be no problem.