a hinged full length mirror from IKEA (Stave mirror - that is x hides jewelry storage -- brilliant idea from The Girl on the Go! I would use a thin sheet of plywood cut to fit behind the mirror so I don't put so many holes in the wall.
Bathroom Design Collections: 30 Brilliant Bathroom Organization and Storage DIY Solutions - Want to be able to easily find clippers, tweezers and bobby pins? Why not just attach a magnetic strip to the inside of your medicine cabinet door?
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.