I finished up, appropriately, with the end of the story.
There was a photograph resting on his pillow. Even from his place in the doorway Sam could see the two wolf eyes staring out at him and he stilled, standing where he was for a long moment before he finally eased the pack from his shoulder and crossed to his bed.
The picture was of a werewolf. Its face was an odd cross between a wolf and a gorilla, with thick round eye sockets and a long snout. Its eyes were green and stared up at the camera, alert but unafraid.
It was Sam. He didn't know how he could tell-- beside the obvious, because when the hell had David been hanging around with any other werewolves? Sam didn't remember him leaving to get his camera at any point during that last full moon, but his memory of that night was spotty at best.
Besides that, though, the picture had something about it, some invisible power... the same power that had been in that picture of Mary, standing in the back doorway of the house.
Sam knew that he'd never done anything to deserve that kind of power, but he wouldn't question it.
So, yeah, the end of the story but not the end of me WRITING this story. I'm serious when I say that I've probably got another 30,000-40,000 words to go yet before this is a real novel. I've the basics of the story laid out, though, so it'll just be a process of stitching them all together.
As far as NaNoWriMo goes... I really enjoyed it. I'm great at working to a deadline, so that was a great motivator. I might start seeking out other contests and challenges--maybe not 50,000 words in 30 days, because WHOO BOY. But perhaps something else along those lines.