The place to start with upgrades, as with many Microsoft Dynamics CRM initiatives, is with the Microsoft Dynamics CRM Customer Center. There’s a whole page chocked full with useful information and links on how to get ready for the CRM 2013 releases — know as Dynamics CRM Online Fall ’13 for CRM Online and Microsoft Dynamics CRM 2013 for on-premise deployments.
For CRM Online customers, you’ll want to pay particular attention to communications from Microsoft as to when the upgrade will take place. If you haven’t heard anything yet, make sure you find out who is getting the communications as it should be your billing administrator as well as your partner.
Your second priority will be to review your existing customizations and make sure they’re compliant with the new code base.
Lastly, you’ll want to plan training for your end-users to ensure they’ll be up-to-speed when the new user interface magically appears one day soon.