Learn to Sing!
There's a certain technique to breathing when it comes to singing and by building these technique, you will strengthen your abdominal muscles and be able to sustain your notes longer when necessary.
Head voice vs. Chest voice
We don't always want to sing too loud or too soft. By learning the difference between chest vs. head, you will be able to control your voice to have the sound that you want to achieve.
When air passes through your vocal cords, it causes them to vibrate and by learning how to place that vibration in the nasal cavity area, we can produce a sound that is full and pleasing.
It is tough to be a great singer when we don't have the right ear training. Making sure we can sing the right note is extremely important. By doing a lot of ear training exercises, you will become faster in recognizing notes.