I had nasty PIH with DS and was on a fast train to pre-e, so once I reached full term my MW gave me a bunch of stuff to do at home to encourage labor in case my BP went so high that they needed to induce. Sex was fun but IDK that it did anything to stimulate labor. I had a mad craving for pineapple about three or four days before going into labor and ate probably half of an entire pineapple (not sure if it made any difference, probably just a coincidence). I did use EPO, though, and I really think it helped make my cervix favorable to dilate/efface. It was also a full moon when I went into labor :-/
Oh, I also drank some raspberry leaf tea a couple of times, but I really didn't care for the taste so I didn't drink much.