So I'm 17 years old and about 5 foot nine or ten yet I only weigh in at about 125 pounds. I've been lifting weights doing pull-ups on and off since mid-2007 and only gained a few pounds in that time. While I'm definately not underfed, I find it almost impossible to gain any weight.

Can anyone help me by telling me what food I could eat and what workouts will build the most muscle, I hate being fn skinny....