What Professions are Best for a Priest?

Tailoring
Alchemy
Enchanting
Jewelcrafting

If you are looking for professions that best compliment the Priest in terms of usefulness of the items created then the best four professions for Priests are Tailoring, Alchemy, Enchanting, and Jewelcrafting. With Tailoring Priests are able to craft useful stat relevant gear. With Alchemy Priests are able to create potions which do everything from increase spell damage to replenish mana. With Enchanting Priests are able to provide a wide range of enchants to gear which increase stats and provide other bonuses. Finally through Jewelcrafting Priests are able to cut gems and create jewelry and trinkets. However useful each of the above professions might be for the Priest, if you are looking to make lots of money with your Priest through gathering professions or simply want to do another profession then by all means go for it!