I don't know how many of you are going for the Profession-related Achievements, but I've been working on the "Chef" title recently. This requires you to do a number of tasks, including cooking every Northrend recipe in the game. You also have to make five Great Feasts and waste them on lame-O PvP'ers (no... I'm not bitter about that at all)! Over the past couple of weeks I've been doing this off and on between raids and rep grinding. I thought I'd highlight some of the tougher tasks in here for those who haven't given this a stab yet:
The Cake is Not a Lie: You have to bake (not eat) a Delicious Chocolate Cake. This could be rough for those who never got the cake recipe. My tip to you would be keep doing the Dalaran Daily and the Outland Daily cooking quests. Those are the two sources for this recipe so I'd work on both until you get it. I would love to see Blizzard take pity on anyone who hasn't managed to get it for over a YEAR and add it to the token vendor's recipes... but clearly they don't listen to me ;)
The Outland Gourmet: This one requires you to make every Outland recipe in the game. Once again, if you're missing one or more of The Rokk's recipes you should probably keep doing his daily until you get it. Don't forget to train the recipes from Kylene the Barmaid in Shattrath.
Captain Rumsey's Lager: This comes from the goodie bag given with the Fishing daily quest in Shattrath. Luckily it comes from the only Fishing quest that doesn't require Outland-level fishing. You only have to do Crocolisks in the City which sends you to Stormwind/Orgrimmar and you can get by with minimal fishing level. I've done it on my rogue who's sitting under 50 fishing skill.
Dinner Impossible: Present a Great Feast in each of five battlegrounds. I'm sure this doesn't sound hard for some of you, but those of us who dislike PvP might not be too jazzed. It's my understanding that you can just pop this up at the beginning of the battle and then leave, just make sure you get the completion credit before you run like a little girl :)
The Northrend Gourmet: Make one of every Northrend recipe in the game. This will require you to collect and craft every new recipe. Obviously the main time sink will be getting all the recipes from the daily quest vendor. You'll also have to get all of the recipes for the Emotion foods, which are random world drops. My anecdotal evidence is that they seem to drop pretty frequently in the early dungeons, so you could try running those. As for the world drop chances, I've looted them from such a wide range of critters that I don't think there's any meaningful pattern.
Collecting the mats will also be a pain, most folks just won't be making such a wide variety of foods for personal use. Concerted effort is required, and if you don't fish it will probably cost you. You'll just have to keep an eye on the auctions and try to find fish that are posted at a reasonable price. For some fish this is harder than others, demand is pretty good for the better fish foods.
My own path required a couple of hours of hunting for specific nodes of fish across half the continent, just to fill in the gaps of the foods I hadn't casually prepared myself. I also had to farm/buy additional meats for the feasts I hadn't made yet. Don't forget you need 5 extra Great Feasts for "Dinner Impossible". Right now I've done every achievement except that one, which I'll tackle later tonight.
As always, feel free to share any tips you might have for the "Chef" achievements in the Comments :)