From a Horde perspective, here's what I do, and it nets about 1250g plus whatever I vendor/auction in about an hour or so (Soooooo close to epic flyers: 23500 gold so far!)

Hearthstone set in Grizzly Hills (whatever the big Horde base is, I just had a brain fart)

Do Blackriver Brawl, fly over and do Venture Co., less than 10 minutes for 40g each toon.

Hearth, taxi to Dalaran and see what the heroic/non heroic dailies are and do them later if they're doable by me (not doing any instances atm to save every copper for flyers).

Fly to Shadow Hold, grab those three, do 'em, fly to that base on the cliff and do the Scarlet Onslaught ones. I pick up the Gathering Information one, but only turn it in when I have 5 documents...I only loot chests that are easy to grab. Take the taxi back from there to Shadow Hold to turn in, and fly to the airship. No Rest for the Wicked, Neutralizing the Plague, Blood of the Chosen, Slaves to Saronite, Drag and Drop picked up there, fly down to the little horde camp and get Assault by Ground, do that and free the slaves and kill any Vrykul you didn't get with Assault by ground, do the two group ones and Drag and Drop, turn in, hearth back to home, and sell, trade all my stuff to main account, D/E anything, trade again, send it all to banker, put on AH, and go to work