Soak your reed in water for 10 minutes prior to use. You may also leave the reed in your mouth, but water is more efficient.
Attach the reed to the mouthpiece as you normally would. Ensure that the tip of the reed lines up with the edge of the mouthpiece. Tighten the screws on the metal ligature to keep the reed in place.
Rest your teeth on top of the mouthpiece and use your lips to wrap around the mouthpiece and form a secure seal.
Inhale deeply using your diaphragm muscles to control the airflow. You should feel your stomach and sides expand if you are breathing correctly.
Blow through the instrument as you normally would and play a major scale in whole notes. Avoid moving your embouchure to take a breath. Instead, breathe through your nose to ensure the muscles of the embouchure do not move from position.
Play all twelve major scales in this fashion until your embouchure becomes too tired to continue. This exercise will gradually increase your control and allow you to obtain a sweeter tone on the alto saxophone.