If you need some extra mental motivation, make this retired U.S. Navy SEAL’s words a part of your audio diet. With his intense and methodical lectures on discipline, Willink breaks down some of the tools necessary to take greater ownership of your intentions. And though he leverages the husky and commanding timbres of his voice, he’s not without some hints of levity, as when he makes fun of bad eating habits on “Snack Time: Sugar Coated Lies.”