Sex!! Not a secret but I would have horrid horrible contractions after!! Starting at like 30 weeks. I remember people being scared but I was like nah it's normal. We had sex the day before her due date, I went to the bathroom had some bleeding....new it was time to have a baby!!
Being at peace and ready for whenever baby decided they were ready to come. The night I quit worrying and was ready for waiting days or weeks more was when everything fell into place and babies arrived for me (at 40w3d and 40w1d with my two I was allowed to go into labor spontaneously and deliver naturally).