Ok in my opinion so far into the content (I mean we are at tier 10 already) selling the raw materials always (this for sure doesnt count for every server but for most it does) gives the most money..
@ Carl
I have a Drood with Epic Flight Form and Mining/Herb at 450.
So what I do is to run either Tony's Huge Storm Peaks Run (
http://www.buddyforum.de/showthread.php?33-Tony-s-Storm-Peaks-Herbs-Mines-Long-Run ) when I am short on Herbs on the AH or I run Merciless' Wintergrasp Run (
http://www.buddyforum.de/showthread.php?34-Merciless-Wintergrasp-Mining-amp-Herbalism ) if I am short on Ores on the AH.
Just be sure to keep an eye on the AH every several hours you get bored or smth. so that your auctions are always the cheapest. ( I am on a high pop server and my stuff usually sells in less than 15 minutes

)
If you dont get how to setup the Wintergrasp ant tmpWintergrasp profile take a look at this:
http://www.buddyforum.de/showthread...ot-tmp-quot-profile.&highlight=tmpWintergrasp
This shit earned me another 3k today

(With only 1 account and almost 0 effort thanks to GB and Auctioneer

Probably 20 minutes/day and no need to care about having different characters with different professions)
This is pretty much common sense to everyone.. I know.. But since the thread name might draw attention of some of the newbs and Carl asked I just tried to help
Edit: After 2 or 3 weeks running those two profiles I found out that on high population servers it is wise to run the Storm Peaks profile at day and the Wintergrasp profile at night simply due to the competition you have in WG during the day. But it really depends on how much ores/herbs you still have on the AH. Try not to have more Saronite/Lichbloom in the AH than others since it just looks suspicious if youre trynna sell 600+ Saronite Ore.