I think about this all the time.
For my dubbings, I found a deep plastic container at a craft store. It is about 4in high by 10in wide by 16in long. The depth allows you to stand all the dubbing packets on end, and you can flip through them. The binder method is good, too, but you can store at least 100 dubbing packages in the box I mention, and do it in a small space. Maybe I will post a picture later.
The main comment from me is to look for storage solutions that match the size of the material you want to store. I try to eliminate "air" storage whenever I can.