If you want more on running techniques there is no better place then to have a peek at the form-obsessed POSE runners. You need to register to view the videos on the first link in
this forum, but it's free and there are lots of drills.
Edit: I'll also add, that moving to a shoe with little, if any support, will give you a ton of feedback on your form. Typical running shoes mask a lot of what is going on between your foot and the ground.