My Warmups for Trombone and Euphonium:
warmup.pdf
Two-Octave Major Scales in Bass Clef for Trombone or Euphonium:
A great diagram on slide positions for all the partials.
A response to some misinformation about playing in the upper register:
The Circle of 5ths:
A one-page study guide to understanding beginning theory:
Three Improvisation Lessons shared with the JJ list in
'99 which were eventually published in the Brass Player's Cookbook:
A listing of all the Jazz Artists with whom one should be familiar: