Best ways to self induce labor?

Basically looking for natural ways to self induce labor. If I can make myself go into labor without having the need to use pitocin, I would be more than happy. I have heard castor oil, , walking, even using the pump a little early (doesn't seem like a bad idea to me). We will not be doing this for another 2 weeks or so, just looking for some methods to use at that time.