I've just deleted several pages from what I was working on and am storming ahead writing them again. It's actually really odd. Not that I'm complaining :).
Also, my husband is a genius. Last night I asked him to read a new submission letter I was working on and he's brilliant. He helped me take apart the pitch paragraph completely and put it back together shorter, but with more information in it.
[Edit: reminder, I have an offer up for help_nz here.]