Well I know that most of the people here use MrFishIt or one of the fishing bots. And maybe half a year ago I thought of doing something I haven't seen anyone else do before me.
What I do is make a, "Cooking Pack". A pack of fish that gives the person or the buyer 1-420 cooking within maybe 30 minutes to an hour of cooking everything in the right order. The reason it only goes to 420 is because shortly after 420 you need to start cooking things via buying the recipes from the Dalaran Cooking Awards.
I generally follow this guide, as to what and where to fish:
Edit3: Seeing as someone had a problem with me using a guide as to what fish to collect and in what amounts, I'll make a guide that follows that with some changes.
Fish to Catch:
-The first fish you want to catch are Brilliant Smallfish and Longjaw Mud Snapper, from what I've seen there's a higher drop rate for Brilliant Smallfish if you fish in Crystal Lake in Elwynn Forest. But there also seems to be a higher drop rate for the Longjaw Mud Snapper in the Canals of Stormwind.
-- The amount I suggest you fish is maybe 80-100 of each. Since with these two the person your selling to is expected to go up 50 Cooking Levels each.
--- So 100 Brilliant Smallfish and 100 Longjaw Mud Snappers
- The next fish you should catch is the Bristle Whisker Catfish. I've had the best luck catching them in the stream that goes through the Hillsbrad Foothills.
-- I caught about 140 Bristle Whisker Catfish, since the person you sell it to is expected to go up 75 levels via cooking these.
- The next Fish you need to catch is Mithril Head Trout, they can be fished in the stream or the pond the stream ends up going to in the Arathi Highlands.
-- The person you sell it to is expected to go up around 50 levels so I caught 100 yet again as some insurance.
- Spotted Yellowtail comes next, I was told the best spot to fish- Or well the easiest was north of Raventusk Village in the Hinterlands. It's kinda slow, but if your hated by the Steamwheedle Cartel (IE: Goblins) then it's the next best thing.
-- The person you sell it to is supposed to go up 25 levels so I caught two stacks.
- The next set of fish you need to catch can be caught in the same area, those fish would be: Raw Sunscale Salmon and Raw Whitescale Salmon. The guide I use says to fish in Darrowmere lake, but you can catch both in Lake Mereldar, in the Eastern Plaguelands and those are the two fish that normally drop there.
-- The person is supposed to go up about 75 levels, so I caught about 60 of each Raw Sunscale Salmon and Raw Whitescale Salmon.
- The next set of fish you need are: Barbed Gill Trout, Spotted Feltail, and Zangarian Sporefish. You can catch Barbed Gill Trout and Spotted Feltail in the Blackwind Lake in Terrokkar Forest, and the Sporefish in Zangar Marsh.
-- With all these the person you sell to is expected to go up around 50 levels, so catch a stack or two of each.
- The last bunch of fish go generally fast, but you need to catch: Bonescale Snapper and Fangtooth Herring. With those I have decent luck fishing pretty much anywhere. You don't need much, but I'd fish about two stacks of each to be safe.
-- With all of these the person is expected to go up around 25-30 levels so as I said, on the safe side catch 2 stacks of each. 1 stack of each if you personally think it'll be enough.
- Now there you can stop, but if you feel like it you can fish some Nettlefish and some Glacial Salmon so they all they have to do are the Dalaran Cooking Dailies to get the Spices and Rhino Meat.
How much of each fish you should have and give:
100 Brilliant Smallfish
100 Longjaw Mud Snappers
140 Bristle Whisker Catfish
100 Mithril Head Trout
40-60 Spotted Yellowtail
60 Raw Sunscale Salmon
60 Raw Whitescale Salmon.
20-40 Barbed Gill Trout
20-40 Spotted Feltail
20-40 Zangarian Sporefish
40-60 Fangtooth Herrings
80-100 Bonescale Snappers
And there you have it.
Anyway, I'm sure you guys get the picture.
I sold this pack on my old server for around 3k.
Hope it helps you guys make money.
Since it wasn't clear to the first poster:
This isn't a guide to get YOU 450 fishing or cooking, it's a helpful suggestion and a tip of something you can do to make a decent sum of money.
This is to help SOMEONE ELSE get to 420 Cooking with the mats that you fish with most likely the bot you use.
As I said, you can sell a pack like this for a decent amount because people are inherently lazy.