with my T - i sent him an email with dot points of what i wanted to discuss about with us. it gave him an opportunity to prepare (think over what i said, whether there was truth in it or if i was completely misinterpreting) and i believe that was helpful.
problem was, he was a bit of a jerk anyway, so the convo didn't go that great (as did most of our sessions). but i believe that if i'd had a T with more empathy skills, then it would have turned out differently - brilliantly, even.