I've been down this road with with my daughter too. I never know what the hell to do and she almost can't be talked to in times like that. So, I usually stick her in the car, take her shopping for a shirt or jeans, then take her out to eat. I don't talk the whole time-- I just listen.
It may be terrible, comforting her with shopping and food, but it sure as hell works. Usually costs me about $100 a pop. Money well spent.
Cyranaok