The thing that I think worked for me was having a big meltdown, emotionally. If you feel yourself getting ovrwhelmed and teary, just let it all out. I felt like my body was letting me down, it had gone into spontaneous labour before my Edd once before, why was I now over?? So I let it all out and went into labour 12hrs later.
That's not actually a bad idea. If you are stressed Dusty, your body will be full of adrenaline that needs somewhere to go so it stops interfering with oxytocin release. You could just let all your frustration out on a pillow - yell, scream, punch it without holding back and let your body burn up those stores.