Naturally inducing ?

I'm 39 weeks, 3cm dilated and 80% thinned out and baby is as low as he can get. My ob set an up an induction on my due date but I'm hopping to go in to labor naturally. I have tried walking, squats, bouncing on a ball, spicy foods, eating tons of pineapple, castor oil, and none of it has worked. Any other tips to get things moving along?