Short book with a big concept

The Dip: A Little Book That Teaches You When to Quit (and When to Stick) - Seth Godin

This book makes a lot of good points about how and when to quit something that's not working, and how to stick with something that may be difficult and frustrating now, but will pay off down the road.

I think everyone should read this, because American society has gotten obsessed with the Vince Lombardi quote, "Quitters never win, and winners never quit." without thinking about what that really means. This book really helps frame that quote and make it much more useful - winners do quit when they know the goal has become impossible, they don't quit just because it's hard right now.