Fishing is level 40. There is a quest that you have to do which starts on a small island just outside of Theramore in Dustwallow Marsh. (See below)
Quest: Nat Pagle, Angler Extreme (Fishing) Bring a friend. Particularly for the 48-50 (Elite) Sharks that like to swim around the Theramore area. I had the honor of being snatched right off the beach by one in Dustwallow. He dragged me into the water and proceeded to smite me. (It was actually quite hillarious.)
After that, the next step up is a book which can be purchased in Zangarmarsh in Outland.
I believe the
Cooking quest in Gadgetzan opened up at level 35. If you buy the stuff in the AH, you can finish the quest in seconds. I believe you need
12 Giant Eggs,
10 Zesty Clam Meat and
20 pieces of Alterac Swiss (which can be purchased right in the cheese shop in the Trade district of Stormwind.)
Last, the
First Aid quest also is in Theramore. It was actually quite simple to do. That quest will raise your first aid and you will learn Mageweave and Heavy Mageweave bandages for free (don't buy the books.) - If you don't use bandages, make them and sell them at a vendor. You can get as much as 1g 40s for each stack of 20.