Seth Godin wrote a great book on this exact question. How to know when you should push through the dip and when you should decide to quit. It's an insightful re

Seth Godin wrote a great book on this exact question. How to know when you should push through the dip and when you should decide to quit. It's an insightful read: http://www.amazon.com/Dip-Little-Book-Teaches-Stick/dp/1591841666/ref=sr_1_1?ie=UTF8&qid=1323703786&sr=8-1 http://www.amazon.com/Dip-Little-Book-Teaches-Stick/dp/15918...