That book might pair well with the key advice I took away from that Scott Adams book:
I've grown very fond of the idea that small changes held onto for a long time are the key to systemic changes in life. It has something zen to me; it's okay to not be at your goal yet if you're doing something to actually get there.
Speaking of sleep, I think you might enjoy the Matthew Walker book I'm reading now. He basically argues that sleep is a panacea of health benefits and the key to a longer, happier, smarter, more productive life. (And if it seems like too large a book, you can read the chapters in any order you like, although I do recommend reading the first three chapters as they cover the basics.)