try Smartcockpit, loads of useful stuff on there. Mnenomics are only going to be useful for your operators SOP's really as everyone operates the Airbus slightly differently to standard.
Get a good grip of the flight control laws and protections that are available before you start your rating - they'll help massively, the QRH is also a bit of a boggle - especially landing distance calculations so have a good look through those and try to understand them.