A sweet farming spot is Irontree Woods. Farm the elementals and Trees for Essence of water, Core of elements, and savage frond. u can make 30 gold in 30 minutes if ur lucky (I was) and they sell quickly at the AH.

If that doesn't work and you need gold quick, I recommend The MMORPG Exchange WoW Gold. They deliver quickly and are cheap! I usually receive my gold within 20 minutes. They're my secret weapon, I highly recommend them!