Power leveling is the process of handing over your character to another player (usually it's a seasoned WoW player), who then gets your character to the highest level possible in the shortest amount of time. In essence, someone else does all the hard work for you so that you don't have to waste your time by leveling the character/s yourself. And as with most other MMORPGs, there are a lot of players who offer such power leveling services for World of Warcraft.
If you're looking for simple, just get actionator. Set it to undercut everything you post for 1c and alt click from your bags. It will place the item on the ah window, do a scan for that item and autoset the price for how much you told to undercut (you can change it accordingly if you feel like it). It will remember if you do stacks for which items and replicate it everytime.
Balance: Moonkin Aura - Starsurge grants 4% spell critical strike chance to 8 allies within 40 yards for 18 sec, stacking up to 3 times. Feral: Leader of the Pack - While in Cat Form, you increase the melee and ranged critical chance of raid members within 40 yards by 5%. Leader of the Pack also causes affected targets to heal themselves for 4% of their maximum health when they critically hit with a melee or ranged attack. The healing effect cannot occur more than once every 6 sec. Guardian: Sharpened Claws - Maul increases the damage done by your Swipe and Thrash by 25% for 6 sec. Restoration: Overgrowth - Instantly applies Lifebloom, Rejuvenation, Wild Growth, and Regrowth's heal over time effect to the target. Hunter
Cooking benefits all classes, especially melee and hunters (it is a free source of food). Until higher levels, the benefits it provides are almost exclusively stamina buffs. While more stamina is always nice, cooking is not essential to leveling. Considering the time investment required, if you pick up skinning then cooking would absolutely be a wise skill to level prior to hitting your level cap, as beasts often drop meat useful for skilling up.