Its pretty self explanatory really.
Buy low sell high.
Get Auctioneer addon. http://auctioneeraddon.com/
Its extremely use full for those types of things.
There is some funky ways that sometimes work and sometimes don't depending on server economy.
Buying and Prospecting ore
Buying Greater essences and turning them into lesser for more G
Buying Primals and splitting em into Motes for more G
Buying Cloths(Runecloth,Neatherweave...) in Bulk when the prices are low and then reselling them on the weekend or on a price hike day.
The Auction House
