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.
A cool tool is anything useful that is superior to comparable items. If you think this tool is inferior suggest a better one. You are welcome to insult a tool, but comments containing insults to individual people will be deleted. Corrections of fact are always welcomed, if stated politely. Recommendations of better tools are dearly wanted and may be elevated to the front page.