Good book for coaches to start the year by Prof Carol Dweck called Mindset. What's the difference between a fixed mindset vs. a growth mindset and the importance of developing a team culture that values process and effort over results.
http://www.amazon.com/Mindset-Psychology-Success-Carol-Dweck/dp/0345472322/ref=sr_1_1?ie=UTF8&qid=1451313887&sr=8-1&keywords=mindset
