Learn to breathe properly. Breathe using the diaphragm. Never, even if you are relaxed, don't breathe often and deep, otherwise it will be harder for your vocal chords to sustain long phrases and high notes. Practice using different techniques for breathing, as well as classes on development of the diaphragm. To make sure your diaphragm properly trained, test it. To do this, simply bend forward as low as possible and start to sing. You must fully satisfy your feelings in my stomach and the sound you make.
Do not overload your ligaments beyond their natural capabilities. Include in your repertoire of songs that suit your voice range. Never squeals and growl, otherwise you just frustrate your voice.
Before you start dubbing, voice work or singing, always do a warm-up. The singing and exercise will give you a richer and less stressful sound.
Use your thumb to lightly pressing on the larynx. Gently massage the throat from side to side, allowing the vocal cords to relax, thus putting less stress on them when you start to sing. To create a more soft voice, place your thumb on the muscle between the neck and the chin, but closer to the chin until you feel bone. Lightly massage.
Before voice, try to eat something spicy. Some of it helps to relax your voice cords, creating the feeling that you was silent for a while. If it doesn't fit hot and spicy food, drink tea with mint. It is not recommended to drink or eat dairy (at least 5 hours before the show). It may have a negative impact on the ligaments.
Drink plenty of water. Avoid alcohol, coffee, hot chocolate. In principle, it is recommended to give up any chocolate. It is best to drink warm water. This will reduce "shock" from the undue stress your vocal cords. The use of lemon and honey is also useful for the throat.
Never overwork your vocal cords, take breaks every 20 minutes of conversation or singing. Take care of your voice.