http://www.mastercard.com/specialoffers/meo/jumppages/MasterCard/257621.html

excludes technology products...

The next time you use your MasterCard card at Office Depot, you'll save $10 off a $50 purchase. You can take advantage of low prices PLUS get FREE delivery on orders over $50 in local trading areas.

Here's how you can redeem this offer: Order online at this link or print this page and present in store. Coupon code 47489693.

If you don't have a MasterCard, I would recommend the Chase Perfect Card (http://www.gottadeal.com/deal-info-id-4501-store-gottadeal.html)

6% rebate on gas purchases for the first 90 days,
3% rebate after 90 days,
1% rebate everywhere else
MasterCard benefits (http://www.mastercard.com/cardholderservices/guidetobenefits/) including Extended Warranty.