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.
Do you have some wasted space in a staircase? Here’s an idea for that expanse of air: put a hammock in it! OODA Architects did that in a house and now there’s a “lofted” space by a window for reading, sunning and relaxing. Fun and yet.