Engineering: Most engineering components require you to have engineering. Engineers don’t want to buy red war gold stuff from others, they make it themselves. If you intend to make money with a trade skill, you shouldn’t pick engineering.

You can sell EZ-Throw Dynamite, mechanical squirrels, and components, but that won’t sell for much. Sorry, no soup for you. It’s a very good choice to increase your own effectiveness in extreme situations: Mainly PvP and difficult group encounters.

Enchanting: Another profession you won’t be making much money early on. If you intend to take this up, expect to make nothing until you get beast slaying.

If you intend to sell, head to either Iron forge (Alliance) or Orgrimaar (Horde), get watch other enchanters, keep track of the prices and sell for a little less.

You will also find group mates and general zone chats to be important sales channels. Minor beast slaying will be your best seller, no matter what degree of enchanting you have, and so be sure you always have the materials around for that.

Set up a system where you are getting the components for your enchanting cheaper than you sell the enchanting for. Always take tailoring with enchanting and make items closest to 20, 40, and 60 to get the best enchantment materials.