^ I went to a legit footwear place where they put me on a treadmill with a camera aimed at my feet and slowed it down to show me what was wrong with my technique. (Here I was, thinking running was just as easy as putting one foot in front of the other - nope, there's a proper technique.) Then I got some shoes that would help correct my pronate-y badness. Don't know if this will help you, but proper footwear is always a good place to start.

Also, maybe I should try a beer after my next long-distance run... I'll replenish carbs and reward myself in one stroke.