The first is taking the air into the lungs. Inhale quickly and deeply through the corners of the mouth, filling the lungs to capacity. Inhalation through the corners will prevent a breakdown of the embouchure formation. This technique of inhalation should be similar to your natural breathing but deeper. Relaxation is very important.
Warm air is the type of air used to fog a mirror or a window.
When applied to the saxophone it allows the performer to use a very large air stream, creating the optimum balance between embouchure, throat position and breath support. When trying the above, use only the mouthpiece, ligature and reed while watching yourself in a mirror. I quote from the same magazine another way of forming the embouchure. You pays your money and you takes your choice. The thing to remember is that you need to take pressure off the reed but still need to maintain control.