If you use godaddy here is a list of some code that will save you some money. These work on renewals.
SPT3 – Will give you $3 off any .com
SPT1 – Is 10% off any order
SPT2 – will give $5 off any order of $30 or more.
SPT20 – 20% Off Hosting Plans (min one year)
These never expire. There are others at
http://www.promo-coupons.com/godaddy-coupon/ if you need them.