people keep asking for secrets but there none.
The whole *secret* in WoW lies before you, use every profession, make mats sell them on AH, use trade to your advantage, play more AH and sell the good you gained by farming.
Eternals, etc...
Then don't buy useless crap for your char, try to see if you can make it first. Then invest. I have 3.5mill now sitting there to be either stolen, swallowed, taken, w/e... secrets? none. Use your common sense wisely. check for mats sell them, useless items? post on AH people might still need them!
really its just the lazy-ness most have to say omg how did you get it!! ... we are all lazy yes!, also keep in mind the more you make the easier you can build a empire of gold.
last but not least realm economy plays a roll, if you can't earn more then 2k a day by those tips..(not rlly tips). then you most likely have chosen the wrong realm to play on.