Pegboard
I have a center bearing wall in my basement (sewing room) so I threw up some pegboard on both sides to house all my embroidery threads, rulers, quilting items, etc. I'm getting ready to add a few more pegboards under the embroidery thread pegboards as my quilting company changed the size of their spools so they no longer fit in my rolling cart properly. I bought my hooks from the Office Supply Store online as I could get them much cheaper than local plus they have a number of different sizes to choose from.
Here are a couple pics of mine.