Before you store away your summer favorites, make sure everything’s clean and free of spills and stains. A little white wine spot or Seven-Up spill will oxidize over time, leaving a brown stain. Pack like-colored items together, and keep everything away from light and moisture. If you don’t have closet space, fold everything (with white tissue paper if you have it) and pack loosely in suitcases or acid-free cardboard cartons. (Grandma would have used a cedar-lined trunk.)