To target your arms and shoulders, try the shoulder matrix and empty can exercises.
Shoulder Matrix: Holding dumbbells in each hand (or other household objects like jugs of water), hold the weights at your shoulders. Press them straight over your head. Bring them back down to your shoulders. On your next repetition, press them up and slightly to the left. Next time press to the right, then forward, then slightly backward. Repeat through all the moves.
Empty Can: Hold dumbbells down and by your sides. Keeping your arm straight, raise one arm forward (thumbs stay up to the ceiling) so that your arm becomes parallel to the ground. As you lower your arm, rotate your wrist (as if you're emptying a can). Repeat with the other arm and alternate repetitions. This emphasizes different parts of the shoulders.
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