How to be a Presentation God, by Scott Schwertly

The upshot: Blah blah blah, a bunch of stuff. When you are preparing a presentation, segment your audience. Blah blah blah, a bunch more stuff.

That one part, the reminder to segment your audience, alone makes the book worth it. All too often, presentation books tell us to know our audiences, but they don’t tell us how important it is to remember our audiences are not homogeneous.