Jocko Podcast is great. It has a heavy focus on self-discipline and leadership. Most episodes consist of Jocko taking a book (mostly war memoirs, although he has delved into Shakespeare and some other fiction too) and breaking them down in terms of responsibility, overcoming hardship and owning mistakes, plus some historical context including examples from his career in the SEAL teams. He also occasionally has guests on, one guy who survived being a POW in Vietnam for six years, other military personnel who bounced back from serious injuries and guys who were in the teams with him. Harley Flannigan from Cro-Mags was also on at one point, that one's a fantastic listen. Dude has lives an absolutely bananas life in the hardcore scene.