lol, i'm by no means a master! i just wasn't brave enough to start until after today in case it did work so mn friends have been teasing me!
(today's dad's b'day and would cause no end of strife if i had baby today...long story!)
with DS i had a friend staying here a few days before and after my EDD. she was training to be a midwife and i really wanted her to be at the birth soooo under her instruction, as soon as she arrived, i had lots of sex, lots of nipple tweaking, fast walks round the block, no slouching on sofa, bouncing on birth ball and a hot curry
it worked, DS arrived an hour after his due date!
perhaps i should add, the sex was with my DH, not my friend!
oh and apparently there's an acupunture point on your thumb as well that if you press it with your forefinger, it'll get things started
but... i don't think any of the above would work if baby wasn't ready anyway...who knows!