Nettlefish farming

The first step is to learn Northrend Fishing, you can learn it from Marcia Chase at the old Dalaran. (53.05, 64.95) You can fish without learning, but I will recommend learning it because you will get a lot more loot.

You can fish in many places, but there are some places that are better than others.

To speed up the fishing you can use:
Shiny Bauble: Increases Fishing by 3 for 10 min.
Bright Baubles: Increases fishing by 7 for 10 min. (Requires Fishing 100)
Oversized Bobber: Increase the size of your Fishing bobber for 30 min.
Nightcrawlers: Increases Fishing by 5 for 10 min. (Requires Fishing 50)