I'm level 80 on my BrM and this is my first tank.
I always start each dungeon with macros: my friendly hello macro, "waiting 20 seconds for you to get your quests", "slow and steady pull rate - please /party speak if you need to slow down. I can't speed up I know my limitations - and please don't pull I'll get 'em all for you". "Let's have fun!"
It's this kind of thing that makes the party dynamic more personal and takes the 'five people just came together anonymously' mechanic that happens otherwise.
This is not foolproof - but it helps and doesn't hinder.