Flying Blind

Is it easier to write from an outline or off the top of your head? Well, for me, I usually have some sort of outline done up, even though I hardly ever stick to the outline. Just having something to help give me some sort of clue as to where the story's going to end up really helps me out.

But, stupid me. When it came to Nano I didn't even have much of an idea on November 1st that I didn't have enough time to create any outline. Now, I haven't a clue where I'm going to go. 2,000 words in and already I'm starting to doubt whether I can create any decent novel. I'm really biting my tongue at the moment because I feel like ditching my efforts for the second time (I can't do that or I'll end up with nothing at the end of the month).

When it comes to serious hit-the-wall writers block, what is the best way to get out of it? And that doesn't include ditching the little bit I've got, because I need something to work from.