Slip-proof your rug: To give an area rug some traction, flip it over, and apply lines of acrylic-latex caulk every 6 inches or so. Once dry, you can safely put down your rug; the rubbery strips will hold it in place!
Individualized "Crap baskets". When you find someone's crap lying around the house you put it in their individual baskets and they have to be taken up with them and emptied by the end of the night. So doing this!