My meditation teacher advised me to try the "rocking the baby" exercise. While sitting cross legged, cradle your left knee in the crook of your left arm, and your left foot in the crook of your right arm. Envision that your lower leg is the "baby" being cradled. The exercise involves bringing your left foot (rather than your knee) up to your chest in a gentle "rocking" motion. Reverse for the other side. I hope that makes sense. Good luck!!