A question to ask yourself: Do you play as high as you possibly can, as low as you can, as loudly as you can, and as softly as you can every day before noon? If the answer is no try doing this each day for a week. The progress in just one week will astound you.
Joe Alessi once commented in a master class that if you are preparing for an audition and don't touch your horn before 1 pm each day you are kidding yourself. Wise words.