The G.S.M. The Great Secret of Motivation is a book that explain clearly and directly one of the essential fundamentals to be able to lead people successfully. To know how to lead people is to know how to motivate them and for it is fundamental to think about what kind of attitudes we are rewarding and penalizing. Whether it is in favour or against of the proposals that the book bring up, this is an essential book in order to think deeply about the kind of incentives we provide the people we have to lead. The G.S.M. is a falsely simple concept that only apply the common sense to the management. Here is the great paradox: How difficult is to do simple things and how easy is to complicate them!!