We did acupressure points (get your partner to it because it hurts and you wont be able to do it yourself) and I tried to express some colostrum the night before I went I went into labour. Not sure they worked though because I was 40+6 that night and felt a bit "different" anyway.

At 38 weeks I'd be trying to distract yourself though- baby not might not be ready for a few weeks yet.