If you're like me, you often find yourself in Shatt with Hearthstone on cooldown, but needing to visit the AH for some auction goodness. If you then portal to Org or the UC to take care of business, you'd have to make your way back to Outland via the Dark Portal, which is a bit further than around the block. Of course, you could always summon the help of a Mage to tag along and port you from one place to another, but willing Cloth-wearing Vending Machines are a little hard to come by. And since waiting for your Hearth's CD is definitely out of the question, what do you do?
The answer is actually pretty simple. Que up for the PvP Battlegrounds before you port away from Shatt. Once you've done so, you can head over to Org or UC, deal with your AH duties, enter a Battleground, "/afk," and viola, you're back in Shatt. In order for this to work, however, you'll have to move rather fast, hope that the BGs don't pop too soon, and not allow the invitations for them to expire. If you can do all of this, you've essentially created another Hearthstone.
Instant gratification for the win.