If you link your Facebook account and share one of your Amazon.com wishlists on Facebook, Amazon is offering a $5 off $35 credit. You can always create a separate public wish list first if you don’t want to share your primary wish list.
Upon completion of the “Share & Claim” action, a $5 off $35 or more promotional credit will be automatically applied to your Amazon account. Promotional credits must be redeemed by 11:59 PM PST on Sunday, December 15, 2013. This promotion is available to customers located and with billing addresses in the United States. Limit one promotional credit per customer. Quantity is limited.