Getting Stuck
Last night I filled out a fantasy world building exercise by Patricia Wrede (NOT all of it, just a portion) at http://www.sfwa.org/writing/worldbuilding1.htm and started writing dialog and promptly got stuck after about four paragraphs. I then spent a long time refining those 4 paragraphs and couldn't think (I'd stopped in mid comment) what the character intended to say. Just... baffled by it. It was one of those "then she said, to change the subject" and really had no clue what she wanted to change the subject to.