Wow, I wish I'd known about this promo last weekend when I took all my coins to Coinstar. Sigh! But you can still take advantage of it. Round up $40 worth of coins and have them counted at a Coinstar kiosk and converted into a gift card, and you'll receive an extra $10 certificate by mail, through December 6. Remember, there are no coin counting fees if you have your money converted into a gift card, and they have some pretty good ones, for Amazon and iTunes and the like.
Find your closest machine here and start lugging those cloth sacks with big $ signs on them.