Rent 2 get 1 FREE at Redbox through 2/14/11!! 

Details: 

During the promotion period, every time you rent at least two items at once from a redbox kiosk and provide a valid email address at checkout, you’ll get an email with a promo code for a free one-night DVD rental. You can earn as many promo codes as you’d like from now until February 14th – there’s no limit!  MORE INFO HERE.