Many people think that the lats or chest are the largest muscle in the upper body. In fact, that place of honor goes to the delts. Hence structuring a proper shoulder workout is a key aspect of upper body training. Nothing builds shoulders like a good old-fashioned dumbbell overhead press. It's become a staple in my routine. (From today's workout.)
The shoulder press can be done standing or seated. Both exercises effectively target the front delts.
Happy lifting!