As you prepare and work through NaNoWriMo, don’t censor yourself. Write down all your ideas.
Sure, some of the ideas will be whoppers, out there, spinning around out of control, but one idea leads to another and another, and who knows where your thoughts will take you if you ignore your inner censor and editor and let your mind wander through the possibilities.
Write them all down. It might not make sense now, but in a few days or weeks, it might be THE idea that changes everything.