Creating Passionate Users is the best blog I’ve found recently, and Kathy Sierra’s post on how not to use PowerPoint is very funny and smart.

Sometimes the best presentation is… no presentation. Ditch the slides completely. Put the projector in the closet, roll the screen back up, and turn the damn lights back on!

Especially if the slides are bullet points. Or worse… paragraphs.
…
The second you dim the lights and go into “presentation mode” is the moment you move from a two-way conversation to a one-way lecture/broadcast. It’s hard to be interactive when you’re behind your laptop, at a podium, watching your slides on the small screen.

Read it!