Gah, my aching knees.
So I've been spending my afternoon on my hands and knees cleaning tile grout. It's not hard to do, but damn, there's so much of it!
Note to those of you who do/will do housecleaning: If you ever need to clean grout, use a steam cleaner. Cleaning it will be easier and the limited steam capacity and time it takes to warm up/cool down give you a good excuse to take a break.