Remember those goofy stretches we did as kids where we posed and held it for 10 seconds? Well, it turns out doing those types of static stretches before running isn't as effective at preparing your muscles as we thought. Dynamic stretching is the way to go these days.
I recently read a news post from a friend regarding New Year's resolutions that really struck me. While he wasn't opposed to people working to better themselves through positive life changes, he was adamantly against the idea of launching those changes on some arbitrary date like January 1.