i have a question

[Ron Burgundy]

i'm been away from wow since early cata so sorry if the answer is obvious.

let's say i just boosted a level 1 char to 90. what is the most efficient way to max out my professions? do i need to farm/craft all the low level stuff and just work my way up?

[Shardik]

Pretty much, unless you got tons to blow on a "profession leveling pack" that people sell on some servers.

Alternatively if you're doing blacksmithing, you can farm ghost iron ore (mop ore) and go from 1-600, but that is usually only best during certain parts of the leveling, when AH prices are too high on your server. Herbalism and mining can also both be done 1-600 just on MoP materials.