Ok, this I think is my first post. If this was posted somewhere else.. then please don't flame me .
Well..I don't know how effective this is because It requires money to do.. but a great way to make simple gold is to do darkmoon faire quests / get the Best Prize box ( i think 40 tix)...
Well you must be level 45 to open them ***
Then sell the prize either to a vendor or AH it..either way I think you make profit (unless the box is empty)
Dont know how useful it is.. but if you make gold from it, great! :P