The Clarinetist's Checklist

I've been catching some bad habits lately: excessive body movement, slouching, and a collapsing embouchure. A framework I use is not to fix bad habits but to continually remind myself of and to reinforce good habits (1).

The following checklist will be mentally run through before I play the first note of whatever I'm playing.

Checklist

1. Feel the 'sit bones' (2)
2. Sit up straight with my head on top of a the spinal column 
3. Form my embouchure (3)
4. Breath well (4)
5. Insert clarinet, feeling the lip pressure all around the mouthpiece

References:
(1) - Arnold Jacob
(2) - See Embouchure Building
(3) - See Embouchure Building
(4) - Maria Callas at her masterclasses at Julliard often said "Take the time to breath well." There are, of course, hundreds of ways thinking about and accomplishing this -- again, I refer to Embouchure Building and Arnold Jacobs for guidance.