I'm no fly on the wall or anything, but it feels like coaches don't really do anything.
"Stay aggressive. Rebound better. Have more hustle than the other team."
I mean, these are what is said during those "wired" moments or w/e, that ESPN / TNT shows the tv audience. This is all common sense.
Although, most of the tactical stuff is done pre-game / halftime / days off watching tape, I would assume. I mean, you never hear a "wired" moment with a coach saying "remember that player X just came back from a sprained right ankle. Exploit that and go to his right," or something like that.