So, in building up Fireflint as a tank, I’ve learned one thing: keeping aggro is much harder than avoiding aggro. With my main being a Rogue, I always made a point of keeping threat on the tank. Tricks Of The Trade is wonderful for that. Knowing to stop attacking on occasion also helps.
As a Death Knight tank, however, I find that keeping threat on me is a bit trickier. I’m sure it will just take practice and knowledge on my part, and convincing the other Death Knights in my party that they need to turn off Frost Aura.