... waiting to escape from Draenor. What to do, what to do?
Make a million gold, of course.
Technically, that's my second million. My first million went towards buying two years worth of game time and upgrading all my heirloom items to max level.
For those curious about methodology: six max-level alts, each will a full garrison (five with a full shipyard). Each garrison includes an Inn (for treasure missions), a Salvage Yard (for extra loot from running garrison missions), a Trading Post (for turning garrison resources into crafting materials), and two profession buildings (typically the character's main profession, plus an enchanting building).
Oh, and the Menagerie, because pet upgrade stones.
The routine: Complete garrison and shipyard missions. Send followers out on new garrison and shipyard missions. Collect garrison resources. Exchange resources for crafting materials. Visit profession buildings to turn crafting materials into high-level materials or items plus sorcerous elements. Visit Salvage Yard to see what my followers brought back from their garrison missions. Vendor anything that had an auction price of less than 500 gold. Exchange any excess Primal Spirits for Savage Blood. Do the daily pet battle(s) and then put any leftover salvage items, crafted items, sorcerous elements, Temporal Crystals, and Savage Blood up on the auction house.
Overall, it takes about an hour a day, and each alt pulls in around 2000 gold a day (some more, some less), mostly from garrison and shipyard missions.
I've got a few more things to spend gold on; I'd like to bank another year of game time, for instance, and maybe buy some of the more expensive mounts and pets. Honestly, though? At this point, I'm just doing it because I enjoy making the numbers go up.
Oh, and so I can blow it all on new neat stuff when Legion finally hits, of course!