When I get blocked, I change stories. Since this happens more often than I'd like, I currently have 3 going. Morganna's story, Sordid Little Games, and this still-untitled semi-scifi one. i spent the majority of yesterday cleaning and writing that last one, which I think is more a short story than anything else. I don't envision it as a longer one, despite the world-building that I've done for it. It just has that short story feel.
Here's hoping I can finish one, at least, and soon.