The water proof little yellow log books from the marine store are great. Can write on them with pencil to add the little notes I always seem to forget. Always make sure the log for each stand indicates the best wind. Nothing worse than sitting a stand when you should not..for whatever reason.
I also like the log cause I mark so many places with the GPS that I have to reference them to a waypoint or I just plain forget why I marked them in the first place.