I think the worst thing is realizing the number of ideas I've had to write about and forgotten the substance of by the time I sat down to write. I am understanding why writing teachers pushed you to keep a journal, a few notes on an idea would really help.
There have been a good half dozen stories I have spaced on. Perhaps I should steal the craptop from the wife when I need to write some notes or *gasp* use some paper. Heh, lesson learned.