In regards to increasing strength, I've finally come to realize that you don't get stronger unless you put some really stinking heavy weight on that bar and squat it. I only just recently started to truly understand this, and as a result, my squat is now higher than it's ever been.
So that's just a reminder from the "Duh, I already knew that" department - no matter what the programming, remember that "heavy" can easily mean a lot more weight than you want to be using.
Or maybe I'm the only one with that problem. If that's the case, you can throw a weight plate at me.