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can clothe you in brands few can afford to buy retail—Herve Leger, Proenza Schouler, Yigal Azrouel—for just 10 percent of the purchase price. The outfit arrives in two sizes to ensure the best fit; the morning after, drop it into the pre-paid shipping envelope, and they'll handle the dry cleaning. If you need accessories, BagBorroworSteal.com
rents high-end jewelry and thousands of designer handbags by the week, month or season; $20 will buy you the company of a simple black Michael Kors clutch for the week, while a Gucci python tote will set you back $85—or $1925 less than you would have paid in-store.