Here's a "how to" on keeping a dream journal. There are also a bunch of other stories about dreams and nightmares if you click the "index" link. I kept a dream journal for a while. I just left a notebook beside my bed and when I woke - before I was really awake and aware - I'd scribble down whatever I had just dreamed. You remember your dreams much better that way and it's really weird to look back on some of those dreams.