Practice regularly, even if you are not preparing for a specific performance. Sing every day, even if only for a short time. Rest your voice frequently between warm up and singing a difficult piece, and always practice proper technique, even during a practice session.
Stand up straight whenever you sing. Ensure that your shoulders are aligned above your hips to avoid restricting the flow of air between your nose, throat, lungs and diaphragm.
Practice breath control when singing. Breathe deeply as often as necessary and propel the air forcefully by tightening your diaphragm when you emit sound. Practice these breathing techniques even when you are not performing frequently, so that these techniques will be second nature.
Sing warm-ups before you try anything technical or difficult. For example, start with scales to prepare your vocal chords and diaphragm before attempting to sing a piece that stretches your range and which requires you to sing notes uncomfortably low or high. Regularly warming up with scales will keep your voice and range fresh.
Exercise regularly to maintain muscle strength through weight lifting. Build lung capacity and endurance with cardiovascular workouts. Your overall physical condition affects your singing voice.
Avoid speaking loudly or yelling. Don’t shout to your friends in a noisy club or bar for extended periods of time as this can strain your voice and even damage your vocal chords. Opt for quieter social locations to protect your voice so that it sounds exactly the way you want it to the next time you perform.