I've found that doing the clean and press is awesome for hitting not only the side and front delts, but the traps, back and legs. You want to make sure that you don't neglect the rear delt head, otherwise your shoulders will really be out of symmetry. Bent-over delt flys (dumbbell and cable) are really awesome for this area. I've also found that if you lay on a flat bench on your side, you can do a really isolated version of the bent over rear-delt fly! Control the weight all the way down in front of you, and be strict on the contraction. You've got to be really careful not to use too heavy a weight, cause keeping your balance can be pretty tough. With a little bit of practice and shifting your body around, you'll find a position that is comfortable and in balance. Good luck!!