Charles Duhigg. The Power of Habit: Why We Do What We Do in Life and Business.
This book offers a very well-researched but easy to understand explanation of how we form and maintain habits. Gaining a deeper understanding of this general mechanism gives us as readers a very useful starting point to develop our own interventions in kicking old unwanted habits and forming new intentional ones. It is not the kind of book that offers a lot of specific advice, but it gives you the knowledge to develop your own best practices. I have found it a very useful framework for improving my own habits, as well as for my coaching work with clients who want to achieve specific goals in their work or personal lives.