Incline DB Curls
Category: Accessory
Muscles Targeted: Guns
If I'm not mistaken the incline DB curl was one of the staples in Arnold's arm training. And if it's good enough for the Oak, then it's good enough for me.
Lay down on an incline bench and curl. There are probably some intricacies to this exercise, but it's a curl so I'm not going to get into it.