This idea isn't for every pair of siblings. It won't work if there's an age difference -- and it definitely won't fly if you fight like cats and dogs. But if you have a sibling who's about the same size and you happen to have similar fashion sense, why not share a wardrobe? You can mix and match pieces from each other's closets or go shopping to buy things together. If you don't want to share everything, you could make a pact to pool your money for big-ticket items you both want but might not be able to afford otherwise. Even if you're not total BFFs, we bet you can get along well enough to snag two wardrobes for the price of one.