Grab a dps spec and quest through all the zones. This will do several things:

1. get you to revered with all the factions and give you access to the 333/346 gear
2. allow you to queue for reg/hc instances while questing (20-30 min queue time)
2.a. going as a dps will let you learn the fights for when you want to run them as a tank
3. get you the 333 quest rewards. I believe there are some in every zone