This little book is an excellent introduction to the world of presenting (and selling) ideas and visual problem solving.  This is a worthwhile book to read wether you think you can draw or not as its mostly focused on visual presentation using doodling rather than creating works of art.  It presents six rough categories for visual thinking: who/what, how much, where, when, how and why.

I like this book enough to want to buy a second copy so I can have a copy at home and at work.