Today, you’re going to split your mind into two tasks.

1) Continue work on your word count.

2) Think of what you’re going to do in December.

If you’ve planned a full story in 50k words, keep in mind that this will be published as a novella, not a novel, unless you’re writing category romance. If you want to publish this as a novel, you’ll need to spend December fleshing out your story. If that’s the case, give yourself permission to include the outline of a new subplot in your word count for today. You don’t have to start weaving it in until December, but if you’re stuck, then why not up your word count even further by going back to earlier points in the book to begin weaving in the new plot?

If you plan to abandon the book after November because it was just an exercise, or because you plan to edit and (hopefully) publish your NaNo as a short story or novella, then you don’t need to worry about December, because December will be for editing, and you’re not allowed to think about that yet.