Sex positions/ other suggestions to encourage labor?

Dafney • Married 11.3.2011 & Mommy 11.16.12 | Born & raised in New York, moved to Arizona '2015 💕 expecting baby #2 7.3.15!
Any suggestions? 
I'm 5 cm & 85% thinned out, in my OBs words "he can feel the bagand top of baby's head" I just need to get my contractions stronger.
He said walking (I walked for hours) & Sex (need position suggestions)
Sorry if it's TMi ladies 😁 but any sudggestion helps!