Cataclysm Quest Line Ironforge to Nagrand

After you complete the quest Tablets of Earth, you turn them into Advisor Belgrum in Ironforge.

Next go turn in the quest, What's Shaking in Ironforge to Stormcaller Mylar.

She'll give you the quest, Subduing the Elements and a bag. Open the bag, and set up the sapta and the totem on the action bar for ease of use. Drink the sapta and go agitated elemental hunting.

They're all in Ironforge and the larger wide open places you go the more of the elementals you'll see.

Click on the totem to get rid of the agitated elements and return to Stormcaller Mylar.

I didn't see anymore connecting quest so I continued to Nagrand to turn in the quest A Gathering in Outland to Gavan Grayfeather at the Throne of the Elements.

Wave to Thrall while you're there :)