Craig Jones on the no-gi Ezekiel: deep cross-face, hide the hand under your own armpit so it cannot be cleared, elbows down and together. Shown from top pins, but the mechanics are the same inside guard.
Study of passing the knee shield: anchor the hand on the hip, parry the knee and slip the elbow inside, then slice. Explains when to swim inside versus collapse the shield.
Chaining a double leg into a side body lock and inside trip when the opponent pulls you up, finishing in side control. Wrestling-first but directly usable in no-gi.