I live in Holland so getting from point A to point B means I use a bicycle. So I bike to the gym. Once I get to the gym, currently I'm using my warm up to work on technique. I'm now relearning the back squat. I've always been a high bar squatter but I'm now giving low bar a try. Despite being a highbar squatter, I've posted here for a long time, so the Rippetoeian ''hips back'' cue made its way into my cortex so I had (and have) a weird and problematic squat. In so doing, I've learned a lot about my anthropometry, how I should be squatting, and it's provided me a lot to work on. One thing that I've learned is that my stance was previously way too narrow and my feet were angled way too shallow. My hips have almost 90 degrees of internal rotation, but very little external rotation (maybe 10-15 degrees). Things that I'm working on is keeping the bar over my mid foot, ''screwing'' my feet into the floor, keeping my knees stationary when coming out of the hole (to avoid the good morning).
I do a lot of the exercises in this video, before warming up with the bar and light weights.
One big clue that I was doing it all wrong was that I used to find it very difficult to hit depth with an empty bar before making the change. My stance now is just a bit more narrow than Cortney's in the above video.