http://www.savingstoobig.com Share the offer via twitter/email/FB and get a $10 coupon off $100 or more at costco.
"Only valid on Costco.com. Not valid in warehouse. One coupon code per Costco member. Ineligible purchases include: new Costco memberships, Costco membership renewals, gift of membership, online gift certificates, Costco Cash cards, custom installation services and online-digital print orders. Not valid for orders at the Pharmacy, Costco Travel or Costco Business Delivery. The merchandise total in your cart must equal $100 or more before tax and shipping to receive the $10 off. The coupon code must be entered in the promo code box at checkout to be valid. This offer may not be combined with any other offer or promotion. No cash redemption value. View Official Rules. Offer expires 12/31/2014."
HT, DN