A big part of nanowrimo is ignoring that "inner editor". Just write. And that's a huge part of the prep for writing anything, too. You're in brainstorming mode, not critical mode, so no worrying about what anyone might think is allowed. Just write!

But sometimes that inner editor won't shut up. So if you feel frustrated, if you feel like that brain of yours is telling you that your writing's no good, this   is what you say to her.

Got that?

Memorized?

Good. There'll be a quiz.