Writing The End

I'm in the middle of writing the last chapter of the second book in my Mark of the Stars series. And things are s-l-o-w-i-n-g down. It's been a long journey with this WIP (work-in-progress), as I wrote it three years ago, and edited and revised it many times since then. With this last round though, I decided to completely rewrite it. I've learned a lot in the last year, since I received my very first contract, and my writing style has changed a bit. I know I still have so much more room to grow as a writer, but I always have my mind open to knowledge.

So, I'm writing the last chapter, and where the previous two chapters seemed to jump onto the page, this one  is taking forever. My characters are indecisive, and aren't moving fast enough to the point where I can say my first (new) draft is finished. I know I have several rounds of revisions to go before the story is ready to submit, but why can't I finish? I already have another WIP started that I'm just as anxious to work on.

Does anyone else ever have this problem with big projects? How do you overcome the slow progression toward the end?

Maybe if I stare at my inspiration for my hero, Nathan Fillion, that will help.