At Best Buy, buy any one qualifying gift card, and get 20% off a second gift card of equal or lesser value. Plus, all orders bag free shipping. That's a savings of up to $10 on any Valentine's shopping you're planning to do. (Or, if you're lazy, a savings of up to $10 on your Valentine's gift.) The gift cards on offer include Macy's, Nordstrom, and Kohl's.