Didn't see any other threads about this, but if there are any others, Please let me know .
First off(Optional): It's a good idea to have Heirlooms, Although you don't need them.
Secondly(Optional): Get a friend (Or another CD Key) and use recruit a friend for the 3x exp.
Last, And Certainly Not Least: Go to the Brewfest camp outside IF (I don't have a horde character, So I don't know if this works there, I'm sure it does.) at 6:15 AM and 6:15 PM Server Time when High Tinker Mekkatorque Is there to tap the keg, You should get a +10%Exp Buff each time, Now go off and enjoy leveling, and since brewfest lasts around 2 weeks or so you can easily get an alt up by the end of the event
Again, sorry if this is a repost, I didn't see anything. If it is feel free to delete the thread.