Ever have an idea in the shower and have no way to record it...and then it's lost forever? I use a "Dive Slate", a small (~4"x6" ) sheet of sturdy white plastic with a plain old fashioned golf pencil attached. They're cheap (around $5-$8), available on the net at various dive shops, fit nicely behind the soap holder or hung in the shower and work well; they're meant to be written on underwater by divers, so unless you shower under Niagara Falls, your thought will be captured until you erase it.