I've been working fishing and cooking together on my Death Knight, since Blizzard saw fit to start both skills at untrained. In the course of using the Fishing and Cooking guide, I've decided to make some notes that El may (or may not) want to incorporate into the guide. Keep in mind that I'm using the Horde version for the Azeroth portion.
* When you pick up the Cooking skill, be sure to learn Spice Bread as well, and purchase 60 each of Simple Flour and Mild Spices, and make three stacks of the food. This will give you a cheap head-start on your Cooking (about 40 points), and add a total of about a minute to your overall time spent.
* To save time, pick up your Expert Cooking and Fishing guides before you start, so that you don't have to take a break to get them. Also if you're Horde (particularly if you're also a Death Knight, since you're right there) swing by the Hinterlands and pick up Nat Pagle's Extreme Angler FC-5000 to keep in your inventory if you don't already have it; this will save you unnecessary trips later.
* In the Horde portion of the guide, I found a part of Sun Rock Retreat in Stonetalon Mountains where the inn runs very close to the lake. If you stand in the right spot you can gain rested XP while fishing.
* The inn at Freewind Post in Thousand Needles sells the cheese needed for the Artisan cooking quest, and it's directly in the flight path from Mudsprocket to Gadgetzan, so I would recommend picking it up there rather than in Desolace as the guide suggests... particularly if you picked up the Expert Cooking Guide already, which would eliminate traveling to Desolace at all (with the exception of the Artisan Fishing quest).
* In the Outland portion of the guide, it states that you should vendor/ditch all the Barbed Gill Trout. I would recommend instead picking up the recipe for Blackened Trout, which can be trained at 300 and can be purchased from Gambarinka (Horde, Zabra'Jin) or Doba (Alliance, Orebor Harborage). This recipe will stay yellow until 320 and green until 340, and since you'll be fishing up about 200 of them, there's no reason not to use this recipe. Also at around 315 or 320 Cooking (I don't remember which) Kylene <Barmaid> at the World's End Tavern in Shattrath sells a Stewed Trout recipe which will get your cooking up to 335 (Yellow) / 355 (Green).
That's as far as I've gotten; right now I'm just trying to get my Fishing and Cooking skills comparable to my level (I'm 67 now, so about 335 skill).
