I have a thing that hangs over the inside of my closet door. It has about 42 pockets and I roll my belts up and put them in there. It takes up no space, so it's wonderful! I also like it because I can see all the belts and everything without having to rummage through drawers, boxes, etc. I like everything where I can see it or else I might forget that I have it! I also put small clutches and scarves in the pockets too. I think it is made for shoes but I don't use it for that...
Here is a picture from spacesavers.com: