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Craft Paper Storage: Special order 2 gallon ziptop bags, 1 gallon bags won't hold 12x12" scrapbook paper. The best price I found was for 13x15" ziptop bags on Amazon in a 100 pack for about $16. Get packs of pants hangers at your local big box store.
To keep paper easily accessible and affordable, use 12 x 12 hanging file folders and fabric storage bins. Each color (or theme, or pattern) is organized in its own folder. With this method, you can easily pull out and flip through any folder to find that perfect sheet.