Consequences of changing domain name
Aside from any customizations, you should:


Check your civicrm.settings.php file to fix the base URL.  (And double-check that your path hasn't changed).
Go to Administer - System Settings - Clear Caches and Update Paths and clear your caches and update your paths.
Confirm that the Resource URLs look right (they should be fine as a result of step 2).
Make sure you get a SSL certificate for your new domain name if you had one for your old domain name.