I keep my bobbins in a clear plastic box according to color and weight. My thread spools are in drawers of an old nightstand I got at Goodwill, they are arranged according to color and weight. When I'm ready for a project I match the two and off I go. I' love to do the rack, but space won't permit it. So far my system has worked so I'm in the "If it ain't broke, don't fix it." mode.