Help your knees! I found this ages ago when my knee acted up from squats or even just too much bending in yoga. This is a list with videos and images of GREAT, easy exercises you can do to strengthen the muscles that support you knee, gently
7 Exercises to Improve Your Hill Running Speed & Endurance
Run Drills and Technique :: Running With Eric :: An awesome how-to video for proper running form (fore foot strike!) and drills to help strengthen and stabilize the muscles you utilize most while running.