my suggestions: mouthpiece playing. scales and simple melodies. pitch bending starting on g on top of the staff, then work your way up to your highest altissimo note. overtones exercies found in the rascher book or elsewhere. when it comes time to play the measure, make sure you are using from e and front f# when you are approaching the high g. last one: wait until selmer comes out with an alto with a high g key. i hear it's in the works!