How did you get better at the mental side of founding? (I will not promote)

Not the business strategy stuff, but the inner game. Staying composed when everything’s on fire, not spiraling after bad investor calls, navigating tough cofounder dynamics, and such. It seems like all of the tactical playbooks are out there but I’ve yet to find anything on the mental performance part. I’ve seen people use coaches and am curious if they are worth looking into. Love the grind and have a solid mentor but can’t help but think there’s a better way to get mentally sharper for what I do. Would love to learn from folks further down the road than me. If you worked with someone on this, was it worth the money?