I sometimes find that I must be partially distracted to do art or write. A movie that's a bit quiet that I've seen eight hundred times dose the trick. "I Am Legend" is working for me today. "The Professional" will be next. I sooo hope they NEVER remake that one. It is perfect.
Anyhow, I think the distractions help shut down my inner critic. I can keep the flow going then, I'll give what I have after three or so chapters to copy editors and friends to flush for typos I didn't catch and to see if it works. It was something I learned from my first novel, go it alone for a while, then, ask for help to make sure there is continuity and order to a point. "Angel" feels so good to me now. I can't wait to finish it!