Minimalist IKEA Cabinet Hack, and lots of other ideas on hiding a litter box. Not just for the litter box but for a dog's or cat's pet bed, when company is over or just during the day, just shut the door and it won't have to be seen until bedtime.
Paint Stirrer BILLY Bookcase Makeover - i really love this. I'm moving my Aneboda cabinet to the bathroom as a freestanding linen closet, so maybe I'll ask them to cut 1 x at Home Depot, then stain it yellow. Maybe even hand paint some dragonflies on it