10/20/30 rule for PPT presentations

This is a really insightful article on Entrepreneur.com about pitching your business through a PowerPoint presentation.

Guy Kawasaki is a venture capitalist who has to sit through long boring pitches from business owners who want funding. But his 10/20/30 rule should be followed by most everyone.

He says that a PPT presentation should have 10 slides. The pitch shouldn't be over 20 minutes. And, there should never me a font smaller than 30 pt.

Why 10?

"Ten is the optimal number of slides in a PowerPoint presentation because a normal human being cannot comprehend more than 10 concepts in a meeting. If it takes more than 10 slides to explain your business, you probably don't have a business."

Well put.