Willpower books that I've found useful and a couple of others
1. The Willpower Instinct by Kelly McGonigal. Based on a course at Stanford.
2. Willpower: rediscovering the greatest human strength. Baumeister. More research than (1) but also very good.
Anything from Brene Brown, especially if you find yourself hampered by perfectionism, guilt, or shame. (Look up her TED talks if you want a nice intro to her work.)
The Most Important Lesson No-one Ever Taught Me is fascinating; the subtitle is, "How I feel matters." (a favorite book of Peter Attia, MD at eatingacademy.com.)
orbiting the giant hairball -- yes!
I am on vacation, halfway through Orbiting the Giant Hairball, and I just want to say 'thanks -- great recommendation!'.
One thing I like about the book is the way it is arranged into little standalone nuggets -- I can read one, put the book down and let the thoughts bounce around my head, then come back later for another nugget.
Organizationally, the book it most reminds me of is Iron and Silk -- another book you can enjoyably read, nugget by nugget.