No cure for bad bosses exists, no matter what leadership coaches & executive publications claim.
Your best practices won't change them.
You'll just destroy your mental & physical health in the process.
Smart move: Start planning your exit as soon as you recognize one.
Two votes.
(Number 15 hits pretty hard as I have a friend currently going through a “high conflict divorce” and 23 years of avoiding communication on finances is a large part of the present problems…)