I just used these New Godaddy codes to renew and register a few more domains.
Just apply at Go daddy check out for instant discount:
Wallet30 takes 30% off all .com renewals and all new .com registrations and . This is the most popular Godaddy Coupon for Renewals!!!
Wallet22 takes 20% off any order over $50
Wallet11 takes 10% off any order. This code works well on all non .com orders including hosting, webmail, registration and renewals!