All you fellow presenters out there, this is interesting:
I agree on a lot of his points, and there's some good discussion in the comments section, too. Here are things I've been keeping in mind lately during presentation prep:
1. You have too many slides. No, still too many (This mentality helped me recently cut 60 slides down to 30. And yes, that was still too many, but it's much better than where I started.)
2. No more than 20 words on a slide, ever. Slides should enhance what you say, not be your actual script.
3. Screw transitions and unnecessary animations.
4. Prep with the idea the computer and projector are going to be broken and you'll have to talk without the slides. It's a problem if you spend more time looking at your slides than at your audience.
5. A couples hours of that kind of prep will help you figure out what you're actually trying to convey. Once you've got that sorted, rework the slides. Or better yet, do this before you even start creating slides.