Vocalists have to regulate their breathing or they end up being fatigued rapidly and their singing suffers.
I have actually never ever yet seen a vocalist– regardless of what genre they sung– who didn’t see radical enhancement by doing breathing exercises.
Begin by taking a good breath, filling your lungs right down to the pit of your stomach. As you exhale try to visualize a candle in front of you, and your breath is moving so gradually that the flame does not extinguish as you breathe out.
Practice this 10 times.
On these next 5 breaths, select a good comfy note you are comfortable with and hold it with a pronounced tone of “Ahh” with the whole breath. Low notes are also excellent since they let the larynx relax. Utilize various pitch each time you take a breath.
For the next 5 breaths, make sure you are progressively dropping the volume for each note from no sound to medium volume and then back to absolutely no volume the whole time of the breath. Be sure to pick various pitch for each breath and don’t ever allow the pitch go sharp or flat. When doing these last 5 breaths all that you are altering is the volume.
For the final 5 breaths (25 in total)repeat what you did with the previous ones, but instead of altering the volume you need to sing your vowels (A,E,I,O,U). It is a great advantage to have a piano or keyboard to play notes then try to resite them back properly using this method
You are probably asking yourself why this is all so important? The reason why is because it trains your voice for smooth pitch. Great pitch is the cornerstone of great singing. It is also a common problem among a lot of aspiring singers.
Start practicing! Keep this up steadily and you will see great results!
For more info check out: http://en.wikipedia.org/wiki/Extended_vocal_technique