I agree^ nipple stimulation. They say to simulate a baby nursing. Also walking, standing, squatting. Things to help gravity to open things up a little bit. Of course there's the fun ones like trying to finish a whole pineapple or eating as much spicy stuff as you can handle. I had lots of fun trying all the old wives tales
Nipple stimulation so far has been the only proven method of helping to get labour started.
Acupuncture worked for me.