While everyone love that few particular muscle group such as biceps and chest, the delts are possible the most important muscle group to LOOK HUGE! delts are what make you look wide.
tips 1: don't do too much of front delt work out. Your front delts get destroyed while you do your chest session so hitting them again in your delt workout will not allow then to recuperate and as a result you whole delts region won't grow.
tips 2: When you are doing any from of lateral raises, keep the back of the dumbbell level or higher than the front. If the front is higher you will be working the front deltoid not the middle deltoid which is what you desire.