I hang all my scrap strips on the skirt hanger, sorted by lengths and then am all ready to go for my next strip quilt.

I purchased a large artist portfolio folder from Michaels for a few bucks. It fits most of my stencils. It is easy to make dividers to seperate the stencils into catagories (which is on my todo list). I had a piece of mortar board left from a project and inserted inside to keep the portfolio rigid. Lays flat and works great. A simple, inexpensive filing system.