The pony tail holders work wonderfully to keep bobbin tails from wandering. The bobbin buddies, those blue units sold at Walmarts, that fit into the hole of a standard spool, are perfect companions. I have compartmented drawers, in which I store threads and matching bobbins,. Also, for odd sized spools....the floral section at some supermarkets will give you free, the plastic nets that fit over the blossoms. These are good for keeping large spools and a matching bobbin or two, together.