It has worked for me and is a significant way of how I think now , especially at work . That said , I only semi read the book i worked at a company that offered 7 H classes , and I took it several times before something made it stick . The first time I learned the material , I had a very superficial way to incorporate the curriculum . Second time was better . Third time I took it in the context of 7 habits for effective leadership , then meta level understanding kicked in . My career also grew tremendously as a result of studying this material and incorporating it into my work practices and interactions . Another one that I layered in which also added a lot of value was GTD by David Allen . Very very useful , from the perspective of productivity and pushing to delivery , meeting deadline , efficiency tips and tricks . I recommend both .