Make Your Bed: Little Things That Can Change Your Life...And Maybe the World by Admiral William H. McRaven
I listen to Admiral McRaven's commencement speech every week. Not every day. Not randomly. Every week. The book expands on that famous University of Texas address, but the speech is what hooks you. Ten lessons from Navy SEAL training distilled into something almost too simple to be wisdom: start your day by making your bed, and you have already won. That simplicity is precisely why it works.