I wish there was a sticky with good videos of the bench, squat, deadlift, and the accessory exercises. It's hard to get much from reading about good form - It's much easier to learn it from watching video clips.
Actually, I had a thread with videos of just about every possible variation of GM I could think of. Oddly enough, Project and I just updated all those videos last night! So, I will repost that thread as soon as we get them rendered and uploaded.