One of the best weight training sites I've used, good guides for the best exercises to bulk up.
As others have stated, isolation exercises are less effective than compound exercises at building size.
As Arnold himself put it, 'as sure as night follows day, get stronger and you will get bigger'
Or summit like that
Also follow @jasonferrugia on twitter, big meathead with good tips
Also the smaller the muscle, the shorter its recovery time is. Legs take longest for muscle ache to go as they are the largest muscle and therefore have more microtears after a session.
Just a thought for planning workouts, cos I can't do squats and deadlifts more than once a week as I'm like the tin man for 4 days after.