When it comes to litter, think inside the box. Both scented and unscented litter neutralize strong kitty odors. Clumping litter requires less frequent changing—though some picky cats prefer the non-clumping variety. Hooded litter boxes cut back on the mess, while self-designs with disposable trays make clean-up easier. Litter liners help reduce spillage. With a litter mat, less litter is tracked through the house after your cat does its business. Waste disposal systems make quick work of litter and seal in stinky odors.