Wrist Curls (palms up). A nice way to work the underside of your forearms, but use caution as the wrist can get overworked! To decrease wrist injury, use lighter weights, do the exercise slowly, and 'pinch and hold' when the bar is raised.
Great article on pull-ups, useful for beginners (although it calls them chin-ups). Overhand grip is pull-ups .underhand is chin-ups (where I come from! One of the best compound exercises for b (Fitness For Beginners Bodybuilding)