Nash has it right.

Another thing you can do is have a friend refer your A account rather than just start it up on it's own.

That way the A account has someone to give those perks to, the mount, the free levels, the free month.

If you start your A account up without an RAF invite those perks are lost/wasted.

You can make sure the bennies aren't wasted without screwing up the link by tangling your own 70 main account in the links.