One of the most important thing about singing is breath control. There are a couple of things you can do to improve your breath control. One of them is very simple, swimming. Who would have known, right? If you swim every day, you will really build up your breath control. The other thing you can do is called the candle exercise. Take a candle, light it, put it really close to your face. Don't burn yourself. Then take a deep breath and blow out but don't blow out the candle. These exercises should improve your breathing and help your singing.