Allow the air to flow through the horn; let resistance and airflow balance into a harmonious, symbiotic relationship.
Do not blow "hard" - breathe "freely", like blowing a flute.
The quality of your playing depends on the quality of your core balance. Remember this is the comfortable balance of resistance including your instrument, and your body.
Lips stay relaxed until the air hits them. Do not present tension. This allows the embouchure to find its own center of vibration.
The embouchure should respond to the air, not vice-versa.
The only job of the lips is to vibrate - fully, freely and relaxed. Make sure they meet in the center of the aperture between top and bottom teeth.
Always aim for the core of the vibration at the rim of the mouthpiece - the center - where airspeed, embouchure and wavelength match perfectly, to achieve maximum core balance.
Allow the music to determine actions. When change is required, allow the music to give you direction. Do not employ a predetermined muscular manipulation.
Rather than controlling with chops and pressure, allow a comfortable core balance, airspeed, corners and tongue arch to provide security.
The feel of playing should be one of a constant outflow of the breath, focused on the vibration point of the touching lips.
Rest as much as you play during practice. Don't play when your face is fatigued. Compensation will cause incorrect habits to form.
Stop practicing when comfortably tired, while still playing well correctly.
