Lemons and pineapple are supposed to work. I took a tablespoon of castor oil and went on a mile walk and went into labor a few hours later
Nipple stimulation is supposed to work too, I tried it and got some pretty bad contractions
Nothing works, baby comes when it's ready.
I've never tried the cinnamon stick and cumin seed tea- but I have heard raspberry leaf works. In my experience the tricks can help you feel like you are doing something, but unless your body is ready they won't work for you.
Some other one's I have heard--
spicy food
make sure you are relaxed and not stressing- sometimes that can slow things down
acupuncture
nipple stimulation
evening primrose oil
Hope that helps and that you are holding your little one soon!