Check domain forums like NamePros as they have a thread dedicated to GoDaddy discount codes under Domain Name Discussion. You usually have to hit the last few pages of the thread as codes expire and new ones are released so you wanna find newer codes that still work. Type a few in that ya find and roll with whichever one still works and gives ya the best discount. I have been using the same .com renewal code for a year+ but it seems some alternate extension codes expire more frequently so check the thread as guys post new ones all the time. GoDaddy is all about coupon codes.
