Parallel Dips
These are great for shaping and building mass in all three heads of the triceps musculature. For considerable training emphasis on your triceps, hold your torso as upright as possible (leaning forward puts primary resistance on your chest). Grasp the handles of a dip apparatus and hold your body up in the air between them and inhale as you lower yourself as far down as you can comfortably descend and then exhale as you push yourself back up to the starting position.