Vaknitter-- how are you doing? 3 days past your due date. We used a home birth midwife who had lots of tips for starting labor. The number one trick that I've heard works for a lot of people is actually to have some intimate time with your partner.
And make sure you're not sipping wine, or other alcohol, because that slows things down and can even stop labor. The average actual birth date is 8 days past the due date (at least for first time moms, faster for second children).