bouncing on yoga ball, evening primrose oil (2-3 gel
caps vaginally at night and 1 gel
cap orally three times a day), some herbs, nipple stimulation (manually or by breast pump. You can also try castor oil but it may cause some loose stools if you are sensitive to it.
I am typing this off of a paper given to me from my midwife, they give it to all patients that hit 39-40 weeks.
It also says walking will help.