Those 20K words seems to have purged a good amount of the story that I've been trying to hammer out. But it also means that I've hit a point where I hate the book. This happens with me, and it's mainly from looking at the words on the screen for too long and constantly thinking about the characters and plot. I have yet to be able to start a book and work on it until the first draft is finished without wandering off to work on something else.
I'd hoped NaNoWriMo with help with this, but alas, this hasn't been the case. While this point may frustrate other writers, I know myself well enough to back away from the project and work on something else. Nothing really says you can't work on multiple projects for NaNoWriMo, just that the word count is important. Yes, I know you're supposed to verify your word count at the end of the month, but, overall, that really wasn't the reason I participated.
Are you participating in NaNo this month? If so, how is your progress?