WRITE THE DAMN BOOK!
That's it. Plain and simple.
Many complain that they can't get the first chapter perfect. Then, they finally get to chapter two and can't get it perfect either. So, instead of going on to chapter three, they decide to re-edit chapter one and wonder why they can't get it right.
Because you're not writing. You only get good at writing by... that's right, writing!
David Edding said: A writer's apprenticeship usually involves writing a million words (which are then discarded) before he's almost ready to begin.Not by editing. After I finish writing my first draft, I usually end up changing my first few chapters anyways because as the story progresses, I find a stronger opening. Don't be so caught up with the first chapter because you may scrap it in the end.
Finish the first draft already.
That's my two cents...take it or leave it.