I found these two pdf worksheets while browsing the web. I think they came from the Liberty Hall site - http://www.libertyhallwriters.org/ .
The brainstorm sheet is for their flash writing challenges. You get an idea (their trigger) and then 90 minutes to write 1000 (?) words. But it should be useful for any short story. In my opinion the character profile is needed for longer stories or for reoccuring characters in shorts. But then I'm not much into character development.