Alright this is my first attempt to contribute and found nothing on it when I searced for it, so here I go:
Recently I needed to travel between Org and Shat for gathering and selling Shiz, so I needed to go back and forth a lot. Since you can only hearth once every hour I had a problem, so I thought: Dur theres a instance here! And it hit me, here are the steps:
1. Invite a friend or even a random person to your party.
2. Run into RFC/Stockade
3. Leave Party
and BAM 1 minute later you get hearthed out. This works great since most peoples hearth is to Shat, and that way you can go to any of the major cities.
This may seem common sense to some ppl, but took me a while to figure it out. So I hope this helps. Thx!