2nd recommendation for the Steve Peters book, one top tip it had was basically ignore any freakouts from your brain between ~10pm & 7am as the “eek TIGERS!!!!” bit of the brain is firing them off but the “don’t be daft, that’s Ted the one-eyed cat” bit of the brain has gone to sleep for the night! Or something along those lines.
Also some good stuff about dealing with difficult meetings and letting people have their say (or rant!) and feel heard, first, as a way of dialling down the tension and making it more likely they’ll listen to you in turn.