Approach placement with the instrument in the exact playing position.
All too many performers bring the instrument to the face with 1) the bell lower than the playing position and raising the head during the initial inhalation, 2) with the bell higher than the playing position, lowering the head simultaneously during the initial inhalation, and even 3) changing the playing position (angle) with each and every interphrase inhalation. When the attack or "blow" is initiated from any of these inhalation faults, the instrument (mouthpiece) literally "crashes into the lips, not only causing injury over time but causing missed placements and many missed initial attacks - all frustrating and destructive! One of our great trumpet players caused just such destruction over time by one or several of these mannerisms.
Since we all are teachers, whether ultimately "our own teacher", teaching others privately or teaching the youth in a school setting such as Middle School, High School or College level, I will be gearing FixYourBrass to include teachers and performers. My posts will have various "topics" (Range, for example), with information for development and maintaining these categories as well as problems that may arise. The posts may be followed by my own "comments" and as to solutions to these problems watch for follow-up posts. So please add your own comments as to create a dialogue regarding said posts as well as any "personal problems" that I can help with. Looking forward to this exchange.