I highly recommend 5 Elements of Effective Thinking:<p><a href="http://www.amazon.com/5-Elements-Effective-Thinking/dp/0691156662/ref=sr_1_1?s=books&ie=UTF8&qid=1423975755&sr=1-1" rel="nofollow">http://www.amazon.com/5-Elements-Effective-Thinking/dp/06911...</a>