Today, though I probably should not have, I made a conscious effort to run on my midfoot although I'm still not completely certain which part of the foot is the midfoot (I just know it ain't the heel), I realized that when running normally, I tend to not heel strike with my right foot, but I do with my left foot (or so I think that is what was happening).  My left leg has always been weaker and that's probably why.  Just trying to control what my left foot is doing is a bit of a problem.

Again, I must say that running with better form does feel better (it seems like more oxygen is getting in and I feel lighter) even if it is tiring after a bit.  I'm sure I have many form improvements to make, but I think I'm headed in the right direction.  Normally, after a run, I have a twinge of pain in the side of my left knee for most of the day, but today, it's not there.  I dunno; I'm feeling lucky, maybe too lucky like something bad may be on the horizon.  Even my pace today was 13:13!!!  Ha.