Quit rewriting the same chapters over and over. Push forward, if the next chapter isn't what you want, write a bridge chapter to get past the part that's giving you a problem.
This will also sound kind of strange, but don't fall too much in love with one piece of work, or keep reworking the same things over and over. I don't know if you're into sports, but I've thought about this story a lot. Roger Staubach won two Super Bowls with the Cowboys, and played in two others. On a Thanksgiving day game, he was knocked out, and his backup, Clint Longley came in. Longley threw two touchdowns in the fourth quarter to win a game against the Redskins. He never had another significant NFL moment. Staubach commented in his autobiography that after that game, Longley would sit around looking at the game film over and over. Staubach said he quit working, and was happy just to relive that one moment of glory, over and over.
Keep pushing yourself, and your work will continually improve, but only if you keep working. When you are successful, move on. When you fail, move on. But keep writing.
Man, that's powerful advice.
I've wanted to finish this story TOO much. Just let it rest and maybe work on something fresh...
I can't write a blog, though. I've tried, and it just isn't the same.
In fact, I miss my typewriter
Writing on toilet paper works for me. If I don't like what I wrote, I can just flush it. Better than a trash can brimming full of my words that will never be read.