This is a URL to bookmark for Dec. 1st:
From here, you can download 73 writing exercises from Donald Maass' THE BREAKOUT NOVELIST.
Use them to transform your NaNo novel from drab to fab!
(That line must be read in an infomercial voice.)
And even if you're not a NaNo participant, don't discount the usefulness of writing exercises to get you out of a writing/revising rut or to help you add depth to your characters or plot.
PS - If you're a fan of Maass' exercises, check out the book WRITING THE BREAKOUT NOVEL, from Writers Digest Books.