I read this based on this blog post at codinghorror.com, including this bit about the book:

Why does this self-help book work when so many others fail? In a word, science! The author goes out of his way to find actual published scientific research documenting specific ways we can make small changes in our behavior to produce better outcomes for ourselves and those around us.

It's dense but has good stuff. Now that I've read and get the theory behind the findings, what I really need now is a distillation of the tips.