Kill humanoid enemies, harvest Herbs and Ores whenever possible. It's worth noting that some of the Ore deposits and Herb patches are "booby trapped", namely, they spawn enemies as soon as you finish harvesting to discourage THAT kind of farming and force Wow Gold
the "normal" RPG farming! Sadly, they fixed the clipping errors that spawned land enemies in midair... That was funny!
Sell whatever you don't need -- Aion actually has a button called "Sell Misc. Items" which will AUTOMATICALLY mark all useless items to sell! Click the Sell button to finalize the deal. Note that this will NOT sell crafting items, nor items you've outgrown, nor even "Useless" items that are part of a Quest, so go ahead and use it without trepidation!