register with Recyclebank!
Costco: swap laptops, cell phones, cameras, MP3s, Blu-Ray discs, games and more for a Costco Cash Card. Visit the site for more information.
MAC (cosmetics): return 6 packaging containers to a counter and receive a free lipstick through Back to MAC.
Staples: recycle ink and toner cartridges for $2 in Staples rewards.
Starbucks: bring in your own mug and receive a 10c discount. Enjoying your morning coffee in-store. request a ceramic mug instead of a to-go cup. Learn more about Starbucks environmental efforts on their site.
What other companies offer incentives? Share the information in the comments and I'll add them to the post!