Learn your voice. Record your voice and listen back, trying to hear it objectively. Understand your range and abilities. Notice your abilities with vibrato, whether you have a big or small voice and how long you can sing before you need to take a breath. You can also consult outside opinions to help you better understand your voice.
Take care of your body. Drink plenty of water, avoid smoking and get enough sleep.
Look ahead of the beat when reading sheet music, so you’re ready for what’s next. This helps you avoid making a mistake if a tricky part happens in a piece, especially if you’re sight-reading the piece.
Keep your jaw stationary, only moving it when necessary. Loose jaws cause better tones, while tense jaws can leave your tones constricted or out of tune.
Listen to the other singers while also listening to yourself, if you’re singing in a choir or other vocal group. This helps you improve as a singer, while also helping the group improve.
Ignore mental blocks. You may feel you’re not the best singer in the group or someone has criticized your voice in the past. Ignore these feelings and continue to improve your voice. Believing in your ability is essential to becoming a stronger singer.