the ny times tech-columist david pogue wrote an interesting blog entry on the use of computer presentations (like keynote or powerpoint):
Pogueâ€™s Posts – Using PowerPoint With Discretion.
in the comments there were some useful links. one is an online tutorial from baruch college on preparing and giving a presentation: Effective Use of PowerPoint: Online Tutorial. furthermore, the blog presentation zen discusses presentation design.
adding on to the references in the blog posting, here is a handout from a presentation on presentation skills which i gave during a tejo-training in strasbourg (october 2004)
finally, this is what can happen, if the presentation is too boring 😉