If you took advantage of the promo pricing but have been a Hostgator customer for a while, it might pay off to review what the current monthly payment to see if there is a cost saving opportunity.
Upgrading my account:
http://support.hostgator.com/articles/pre-sales-policies/billing-account-changes/how-do-i-upgrade-my-account-to-a-better-plan
Canceling my account:
http://support.hostgator.com/articles/pre-sales-policies/billing-account-changes/how-do-i-cancel-my-account