Hidden space behind a picture, http://hative.com/clever-hidden-storage-ideas/
paper towel is hidden yet accessible love this cos i think paper towels are ugly
Hide eyesores- thermostats and alarms with hinged art.
Great way to organize kitchen, bathroom items when attached inside cupboard/pantry doors.
Crate wall bathroom storage @ DIY Home Design
50 Genius Storage Ideas (all very cheap and easy!) Great for organizing and small houses.
very clever hidden drawer