I'm probably crazy, starting to write the sequel to a book I haven't sold yet; but I've been thinking about it on and off for a month or two, and writing notes, and the impulse to get the first page down on Word became too much for me. Also, I've noticed I'm happier when I have a novel in progress.
So three days ago I began once more the scary, rewarding business of writing a novel. (I use the word business loosely, since no one is paying me for this. The rewards are purely creative. As yet.)
I've written just over a thousand words. Only 74,000 - 79,000 more, and I'll have a book.