I've been reading a lot of books written by Navy Seals recently. Sounds silly, but my alcoholism is my greatest enemy and I want to face it with the heart of a warrior. Just finished Resilence: Hard-Won Wisdom For A Better Life by Eric Greitens and highly recommend it! Right now I'm reading Extreme Ownership, written by two former Seal officers. It's about owning up to who you are and taking responsibility for your actions. One of its authors, Jocco Wilkinik, mottos is "discipline equals freedom".
I also read The Four Hour Body, trying to get healthy, and loved it.