Great book that makes you think about life. I found myself sometimes confused as he switches between parody, metaphor and literal passages - never quite knowning when to take him seriously, but the message is the same either way. "Don't you see what I am trying to &*%%^# show you people!!"
Blink: The Power of Thinking Without Thinking by Malcolm Gladwell.
The 7 Habits of Highly Effective People, Stephen Covey. This book has been around a while, but it's a must read. Simple, clear, good examples without reading endless case studies.