My nonsense advice is to plan something you can't do if baby is here, and so (s)he will show up so you can't do it.
My stupid one was we had an amazing dinner the night of my mom's family-only prayer service (she had just passed away). I had kobe steak. Couldn't finish it so I put it in the fridge to have the next day.
So of course I go into labor so I can't eat my leftovers for lunch. DD#1 owes me a steak.
Maybe make an appointment for a pedicure or a massage or something so LO can arrive and spoil it!