Okay.
The 10/20/30 Rule – 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.
The Lessig Method – the functional opposite of the 10/20/30 rule and best illustrated by the man himself (scroll to the bottom for video).
In both cases the focus of the presentation is to capture attention though they use drastically different approaches. Pick one of them.
Essentially you want to avoid this:
I think it’s tragic that I’ve seen powerpoint slides in $BIG_CORP that may have beaten this one to the title of “Worst Powerpoint Slide Ever”.