The 7 Habits

A great book, I recommend all of you to read.
Going through the book you can find these words, "Sow a thought, reap an action; sow an action, reap a habit; sow a habit, reap a character; sow a character, reap a destiny", and then he defines habits as "the intersection of knowledge, skill and desire", revisiting them as "Knowledge is the theoritical paradigm, the what to do and the why. Skill is the how to do. And desire is the motivation, the want to do. In order to make something a habit in our lives, we have to have all three.", changing a habit according to him seems to be "a painful process. It's a change that has to be motivated by a higher purpose, by the willingess to subordinate what you think you want now for what you want later" which produces happiness.
The book can be ordered through amazon.com, just search for either Stephen R. Covey publications or directly make your criteria the name of the book "The 7 Habits of Highly Effective People".