Great stuff above
-Band Distractions and band dislocates are 2 of my favorites for upper body/shoulders. Its easier to reach back to the bar, and stay upright when squatting when your chest, shoulders and upper back are feeling good.
-I've been doing the "roll-over" exercise since I was 11, in middle school wrestling practice. At first I thought the older guys were playing a joke on me. It's cool to see that drill is world-wide.
-I read about the knee over the toe drill in a Mike Boyle article last month. At first, my knee was all over the place, now things move much smoother. I think some of my lack of mobility or flexibility, was just moving wrong.
To try to stay more upright, I've been doing lots of lunges in place, step ups and suitcase walks. I hold a dumbbell in 1 hand( the off hand) and focus on using my abs and and obliques to keep straight and square.
This stuff is easy to toss in during warm ups, or between sets. Or during mobility/recovery sessions. Or while you catch your breath during your conditioning. It doesn't have to be endless and boring.