LivingSocial has a great deal on Costco membership. $55 gets you a 1-year Gold Star membership, a $20 Costco cash card, and $29.47 worth of bonus coupons...

Until 5/18/14, get 15% off sitewide at LivingSocial.com. Unlike most of the Living Social coupons, which are good for a max discount of $20, this one is...