Like Amazon on Facebook, and click claim this offer, they will send you a email. Offer expires Sunday December 9.
Once you have your code: Redeem Your Offer here.
Be sure to choose something Ships from and sold by Amazon.com and is $25 or over.
Expires 11:59 PM PST on Sunday, December 9, 2012. This promotion excludes Kindle devices, digital downloads and gift card purchases.