More to explore:
Cup holder - Joseph Rathkolb / Patrick Schiestl
Cardboard Sculpture ..this is a good technique for creating rounded forms
DIY: Cup hooks and dowels holding wrapping paper... easy! This would be a great way to store foil, saran wrap, etc. in the kitchen.
Organize all those pencils, especially useful after that cardboard box they came in starts falling apart.
Fried Egg Pot Holders by xxxRedStitcHxxx #Fried_Egg #Pot_Holders #xxxRedStitcHxx
Inexpensive scarves holder idea. Click for the tutorial. irinascutebox.blo...
Key chain/holder from old seatbelt buckles - now that's cool!...I may never lose my keys again...lol
Gift Wrap Storage. Plastic bag holders from Ikea. Genius!
French Label Tissue Holder Makeover The Graphics Fairy DIY
Who knew a juice carton can be used as a card holder/purse? They're a great material to use for that purpose, because they're so tough.
These arrows are made from just cardboard, paint and some clay. They're designed to be placecard holders, but I can think of dozens of uses and variations for these. More details at Fellow Fellow
Felt Panels by NORM for Menu, modular panels. A panel with a mirror on it, a clock, panel where you can hang your keys on...
cd racks to lid holders- not sure if this is space efficient, but the thought of it just makes me smile :D