We have all been present in this scenario (or been guilty of this ourselves) . Someone throws up a presentation in a meeting with one hundred slides in tiny font, and an hour later everyone's eyes are glazing over and they are starting to snore.

In order to combat this occurrence, Guy Kawasaki has come up with the 10/20/30 Rule of Presenting, a Mental Model designed to ensure any sort of presentation trying to reach some sort of agreement stays on point. Let's break it down.