A good idea for a small bathroom, under hanging shelves for things like cotton balls, cotton swabs, etc. Also great in the kitchen, for a spice rack over the stove. Just hang jars from bottom of the cabinet.
Stretch a rubber band over your gallon of paint to swipe the extra paint off of your brush. (If I manage to do this without spilling the entire gallon of paint getting the rubberband on, it's truly a genius idea.
Poke a hole in the bottom of a muffin liner with the end of the popsicle stick, slide it up, and worry less about how many drips you’ll be cleaning up off of the furniture, floor and their clothes later.