Practicing- Stop when body tires. Mind, and body, should still have ideal in it. Ideal is only constant.
Clarinet- air feels like it's going either way, in or out, while blowing, not blown out, but let out.
Concentration/centering while practicing- idealize feeling and sound, w/o instrument, relax body, feel air column simply there.
Air column feels like 2 way tube going from bottom of stomach to end of instrument, always, especially articulation.
The goal of practicing is to get out of the way of your own intuitive singing expression.
Be grateful for your mistakes; they give you fodder to enrich and imrpove your practice and your self.
Control- To give your sheep or cow a large, spacious meadow is the way to control him. (Shunryu Suzuki)
Using your self well is primarily a consciously directed state of mind.
Never practice the same thing twice without knowing you are improving/maintaining it. No mindlessness!
Alexander Technique- Learing to connect deeply with your whole self.
"What we call I is just a swinging door which moves when we inhale and when we exhale." Shunryu Suzuki
To improve your playing requires thinking in terms of improving your whole self.