The long head can be seen from the rear, and it would look weird for a guy to have this massive shelf of shoulders and traps with some sad-ass triceps sitting next to them.

Along with doing your heavy pressing work, throwing in a sweet metabolic-stress giant sets for the triceps is a nice addition to bring those puppies up. Try this one:

A. Rope Pushdown – 12 reps
B. Overhead Rope Triceps Extension – 12 reps
C. Bodyweight Bench Dip – 12 reps

If you can get through this giant set four times, hitting sets of 12 reps all the way through, then you're setting yourself up for triceps gains. Do these after your heavier chest or shoulder pressing movements. – Paul Carter