Doing the standard BB press behind the neck will insure that the shoulders are forced into being inline with the actual pressing muscle of the deltoids. If doing this with a DB's, than warmup the shoulders with just a empty bar first (press behind the neck). That do the DB version. Keep the mind on the position of the elbows and that they are kept back/inline with the body, even when they are overhead.
The Cuban Press is a excellent delt exercise, which can be akin to the above DB in line with the shoulder exercise. Greatly overlook by most BB'ers, but not by athlete's. Might find a video that can explain the movement fully. This exercise (and forms of) are used in rehap medical centers all over.
Got the Arnold , "W", Scott, Gironda, side press, see saw, alternate, one arm, etc, etc, etc. The only difference between a lot of these DB movements is the hand/grip position and the path of the overhead motion. Pick your own poison because the variety out them should favor anyone. Just learn to do each one the correct way. Good Luck.