Make a scribe.

anyád :D

Bags.. lots and lots of bags.

Start with Netherweave.. on my realm atleast I can sell 200 - 400 a weekend, probably more if they didn't take so long to make >.> Blizzard need to fix that cast.. Embersilk only take 3 seconds? Anyway.. Bags!

It's possible for me to buy all the mats needed and then sell the bag for x3/x4 the cost. Afk a bit while they are being made :)

sell herbs.

or

Transmute alchemy, sell your transmute for an easy 100g per day or do the trans yourself. On my server, Volatile Air are at a premium and I can usually get a good 400-450g per 15 from my life->air transmute in Uldum.

Not remotely close to the profits some people make, but it's enough to keep you going with cash to spare.

sell your truegold transmute, rather.

I wouldn't make a scribe - unless you really want to have every crafting profession covered. But inscription isn't going to be the strongest moving forward, since darkmoon trinkets will mostly be a thing of the past. Glyphs will see a nice bump in 4.2, and they still provide steady income. But you should work with what you have. Every crafting profession does quite well at the start of a new tier.

JC - Gems of all types will be extremely profitable. If possible, try to amass a large stockpile of inferno rubies. And the way to do THAT is...
Alchemy - Guild cauldrons have made flask mastery a thing of the past. I'm sure there's profit to be made in potions, but I've never explored that market. The key is making Inferno Rubies as a transmute specced alchemist. Truegold prices will rise a lot with new craftables, hopefully you have cheap volatiles on hand.
BS/LW/Tailoring - all of the new PVE and PVP recipes should do quite well.