Position your body for optimum vocalizing. Stand up with shoulders back and chest open. Level your chin so it does not tilt backward or forward. Relax your body including your chest, neck, knees and feet. Smile so your voice is bright and energetic.
Practice various exercises to stretch the range of your voice and to improve your tone and pitch. Use piano scales to help you match the correct pitch. Record yourself to find out if your notes are matching the piano. Listen to the recording and work to adjust your pitch accordingly.
Learn the correct breathing techniques for singing and practice them. Start by breathing air into your diaphragm until your body expands, filling with air. Your diaphragm includes the muscles around your lungs and upper stomach area. As you sing vocal exercises, let the air in your diaphragm leave your body slowly. Practice this often to keep yourself from putting strain on your vocal chords, thus preventing damage to them.
Remove breaks in your voice by practicing a special vocal exercise. Start on the bottom note of your range and "slide your voice" all the way to the highest note in your range. You will notice a crack or a break in your voice. Continue to practice this sliding method, concentrating on your diaphragm in the areas where you hear the break. Do this until your vocals blend together into one smooth sound.
Enunciate each word as you sing it, being sure to have special emphasis on consonants so that the audience can hear what we are singing about. Singers often tend to stress the vowels as it shows off their voice nicely, but consonants helps the audience engage in the music. To have good diction, practice concentrating on a clear, precise pronunciation of each word as you sing the song.