I have a gig coming up and I have needed a little kick in the pants to practice. My solution this time was to skip the warm-up. Sure, I did not start "wailing" right away; I started practicing the part I needed, but down the octave to ease into the playing. While I always encourage my students to do some sort of warm-up, and to vary this day-to-day, playing is better than not playing, so do what you have to do. And, do not feel guilty about it. Just be happy that you put the horn on your face.
Dr. Michael Kearns
Musician, educator, husband, father, web designer ... my life is like a mosaic with each piece vying for my attention.