Hi Tia,
I am by no means an horticultural expert, but am a little familar with hydrangeas. Cut the dried bloom off just above the first "bud". Unless your hydrangea bush is crowding the space available you won't want to prune the stalks as the popular belief is that the blooms flower from the "old" wood. Does this make sense? So whatever stalks grow this year will bloom next year. I hope this helps. This is how my grandparents took care of their hydrangeas on Cape Cod, and you should have seen the size of their bushes!!!
Good Luck!
Carrie