I love it when a plot comes together

I've got a partially written short story on the hard drive that's been languishing in limbo for a few months.  It wasn't coming together, and I knew it subconsciously, but I couldn't put my finger on why.  Well, last night, I finally realized what I needed to do.  In about a half hour, I had about 700 new words cranked out.  It's still mostly unwritten, but at least now I know where the story's going and how to get there, more or less.  It's a good feeling.