Go to godaddy.com and unlock all of your domain names. Make sure you have access to the administrative e-mail specified in each of your domains.
Sign up at dynadot.com and pre-pay $500 to get bulk pricing, e.g. .coms for $7.75.
Highlight and copy the list of domain names from godaddy, and paste into the bulk transfer tool at dynadot. Pay with your account balance. Godaddy and/or Dynadot will send you a confirmation. A few days later, the domains will be under a new registrar, each extended by a year as well.
Congratulations! You've moved your domain names! And you didn't have 30 ad screens at checkout, either!