Acupuncture!!!! I am sooooo a believer now ....
Raspberry leaf tea tincture - my first two pregs I drank the tea and it didn't seem to help regulate my contractions - had acupuncture weekly from 35 weeks and took the tincture and my labour and birth was totally natural and wonderful (yes, weird to say that ...)
Lots of walking
Rest with feet up a few times a day to make sure if labour does start, you don't go into it too tired
visualise your preferred birth ie squatting, kneeling, standing etc
try not to think too much about "pain" or pain relief options, you may not even need them!

Oh, and acupuncuture ........... did I say acupuncture ....??

Good luck!