I have just realized how bad my chops were being abused (too much lip pressure) and have had to re-organize the way I practice. However I have had to do this without a proper tutor/teacher. I have about 3 months in which to find the proper way to play until my school starts up again. I am currently practicing playing while pouting my lips out (as opposed to curled in), with as little pressure as possible. I was wondering which method book I should use to improve. I'm not looking for a shortcut, just something to help me get better tone and range. Anyone have any recommendations?