I'm following the Practical Programming for Novices progression (by Rippetoe). Last night I did 2x5 45lb (warm up), 1x3 60lb, 1x2 80lb, 1x3 90lb (this was supposed to be 3x5 but my left knee felt wonky on the 3rd rep so I quit and lowered the weight), and 3x5 75lb. The video is of the first set. I want to try to work on getting lower, and hinging more from the hips.
I've been following Mark Rippetoe's YouTube videos on weight training. He teaches form, including a all the mechanics of WHY you should do something a certain way (like I showed in my post on deadlifts). I watched his videos to decide whether to do low- or high-back squat, and what kind of form to use. I'm such a geek, I know. He discusses the merits of a low-bar squat and talks about angles and power and how those two things are related.