Farm herbs and ores to the AH, these first two weeks ive made 200k casually farming, imagine if i dedicated all my WoW time to it? gotta jump on it quick though prices only gonna go down from here
when raid launch crafted stuff will sell good too. Stock up on meats and fish for feasts
unless your on a dead server like i used to be then really your only good bet is farming old raids with multiple alts