Try doing the lateral raises while seated on a flat bench. Start each rep from a dead stop, resting the dumbbells on the bench between reps. Also, try raising your little finger to the sky at the top of the rep on lateral raises.
When you do push presses or military presses, make sure to fully lockout each rep and hold for half a second before lowering. Push your head forward to really get the weight locked out ABOVE your head, not above and in front.
If you have the shoulder flexibility, try doing behind the neck presses, they will definitely add mass to your shoulders.
Also, just for fun, try this as a finisher on your delt day. Use the same weight for everything, without setting down the dumbbells, and no rest between exercises. Incline lateral raises facing the bench (reach out like a Y) for max reps, Incline laterals facing away from the bench for max reps, Seated incline front raises for max reps, Standing Lateral raises for max reps. Immediately following this, go to the cable station and do some facepulls (should finish each rep in a double bicep pose while holding the rope).
That finisher is a killer, if you chose the right weight, you should be able to get about 8-12 reps on each exercise.