We've just spend the last week in pitch training at the Central School of Speech & Drama. There are a few tricks we learnt - mainly we did a lot of breathing exercises. The teachers made a good point when they said that most of our communication is non-verbal: tone and voice and body and eyes speak more loudly than we'd sometimes like.
Turns out communication (like so many things) is all about breathing.
Anyway, on the topic of pitching movies, here's one hilarious way (not) to do it: