For the next 13 days, head over to Saveology and purchase a $15 Staples gift card for only $8. Once you make a purchase, your coupon should be ready to use within 24 hours. You can use this with this coming week's deals at Staples.
Saveology is a social couponing site similar to Groupon and livingsocial. Once you sign up for a free account, you will receive daily e-mails featuring products and services at significant discounts. Currently, deals for specific states and cities are limited, so you will probably be better off signing up for national deals. Recently featured deals have included $15 for a $25 Boston Market gift card and $12 for 40 AAA GP Alkaline Ultra batteries (a $50 value).
Want more information about Saveology? Check out the Frequently Asked Questions page.