Guy Kawasaki writes about his 10/20/30 Rule of Powerpoint:
It’s quite simple: a PowerPoint presentation should have ten slides, last no more than twenty minutes, and contain no font smaller than thirty points.
Dave Briggs
An online notebook
Dave Briggs
An online notebook
If you like that sort of thing, try http://presentationzen.blogs.com/
Anything that makes these things shorter is good for me… Thanks for the link!