This video parody of Nano is so wonderful and amusing, I must have watched it a dozen times. The second video teaches you how to use the Nanowrimo.com site.
The website is incredible and I highly recommend you spend as much time there as you spend on your book because it is that cool.
Just as a warning, they updated the Nano site and several of the features he mentions aren't available yet, but they will be soon.
I promise won't talk about Nano all the time, since I don't want to bore readers who aren't participating, but I will mention it occasionally.