Use them to keep coffee bags sealed, hang washing, use them as cable tidies - there's all sorts of uses for them. Try to get hold of the 50mm ones.
Wrap the metal arms in paracord. Wrap a couple of rubber bands around the arms. http://lifehacker.com/#!binderclips
Apart from the obvious wardrobe use, they make good shelves for books and so on when suspended from a wall.