Resources!

Using AAM URL redirection as part of the upgrade process
https://technet.microsoft.com/en-us/library/ee720448(office.14).aspx

Configure forms-based authentication for a claims-based Web application
https://technet.microsoft.com/en-us/library/ee806890(office.14).aspx

Determine upgrade approach
https://technet.microsoft.com/en-us/library/cc263447(office.14).aspx

Performance and capacity management
https://technet.microsoft.com/en-us/library/cc262971(office.14).aspx