Here is a list of domain name renewal, registration, transfer, hosting & SSL codes to use at Godaddy.com for your savings.
gdbb776 .net $7.70
goxtgi200c .com $6.95 Should work at TDNAM as well.
gdp0824t - .com, .net, .org, .biz, .us, and .name $8.69
gdp0907c 25% off .com purchase/renewal Expires 9-30-2008
$7.15 .com ZINE3
$6,99 .info gdbb776
$7.50 .org gdbb776
$9.19 .net ZINE3
$8.49 .us DOWNFORCE
$7.05 […]

Here is a shorter list of Godaddy.com discount renewal and registration savings codes then normal but still any savings helps!
goxtgi200c $6.85 .com Registration and Renewal! Wow
gdp0627e Will save you some $ on .org domains purhased at TDNAM.com
oyh3 $6.95 .com renewal or new domain purchase
oyh1 10% any purchase
btps7 20% off any purchase of $50 or more
oyh2 […]

Here are some Godaddy.com discount coupon codes.
NET, .MOBI, .COM & .US ALL $7.99 gdp0224w
oyh3 ~$7.20 .com
cjcbentld ~$7.64 .org, $12.74 .mobi, $6.99 biz
$6.79 .us, $7.81 .net, $8.49 .name
gdp0202d ~20% off $75

Here are several Godaddy.com coupon codes to use for renewals, new registration and so on.
oyh3 for $7.20 .com
cjcbentld for $7.64 .org
cjcbentld for $12.74 .mobi
cjcbentld for $6.99 biz
cjcbentld for $6.79 .us
cjcbentld for $7.81 .net
cjcbentld for $8.49 .name
cjcbentld works for tdnam also
gdp0202d for 20% off $75