I have two old Creative Memories binders with the old plastic CM sticker sorters. They don't make these anymore. I just bought a bunch from my CMC for 15 cents each! They used to make them in all different sizes and they held from little individual stickers to 5 inch stickers, up to 9x11 size and the large sticker letter sizes. I was surprised they stopped making them because, for me at least, it's the most convenient way to store stickers. I use a third CM binder for die cuts too.I use the Cropper Hopper sticker envelopes. They come 3 to a pack for about $6. There are 2 large pockets, a medium pocket and a small pocket per envelope. The largest pocket holds 12 x 12 paper too. I have my Disney stuff sorted by character...paper & stickers in one thing. Then the envelopes are stored in Princess Nancy's converted priority mail boxes, but they are supposed to fit in the Cropper Hopper verticle storage system.
Here is a pic http://www.cropperhopper.com/ProductImages/CNSE.jpg
They zip up very nicely and don't take up much room - I just stack them with the book I'm currently working on. My sister uses those stacking set of three drawers from Taget that others have mentioned, but that means she's not terribly mobile. I pick up my folder that has what I'm working on and I can move anywhere in the house. I'd highly recommend it.
and bigger stuff is at the back of my CM paper folder thing. Swap stuff is carefully balanced on top of other things so it doesn't get squashed 
Mine are sorted by category in page protectors in binders! I have 5 small binders each with a different category. It works fine for me. At least for now.

) and made myself organize my srickers. I used the same page protectors and put them in 8 X 11 1/2 inch plastic folders I got at A C Moore the other night. It seems much less bulky especially if I need to take them somewhere. I have one for letters and one for other stickers. Thanks again for all the wonderful ideas!!! I may use them in the future.How are you able to keep the stickers in there without them fall around each other. I have a bunch of page prot for a book i don't use(3ring) so this would be a great idea for me!![]()