Hold these few stretches for 30sec each. There are many more you can do, but these are the minimum for the average runner. Also recommend a side bend each side.

If poor movement and strength in your feet is causing hip and knee pain (& it could be!) here is a quick and easy way to help yourself

How to check your glutes, stretch the muscles that might be inhibiting them and simple exercises to start working glutes that don't fire

How to use a ball to roll and release your glutes. Includes two glute stretches and what equipment you can use.