Well there you go. Why not keep a dream journal? It's fun to go back, a month from now and read the random dreams, lucid or non lucid. Each time you read it, it's like you're right back in the dream. Even if you left out some small details they come back, to me anyways. I even like to keep a day journal, since most of us don't remember our days xP So why would it be different for the night?