Do you take cleaning to a scientific level? Then you might find Real Simple's Periodic Table of Cleaning (PDF file) a complimentary schedule for your cleaning habits, from weekly wipe downs to yearly professional cleaning for rugs and upholstery. Print it out and stick it on the fridge for an easy to read reminder (we're going to enter the scheduled dates into our Entourage/Outlook/iCal calendar for pop-up reminders on our computer). [via Organized Home]