No advice on how to prepare I'm afraid...
I did have the threat of a repeat CS hanging over me if I didn't go into labour, just because there's not a lot they can do to induce. All I was offered was AROM, but at my antenatal appt at 41 weeks my cervix was very high & closed, if it had stayed like that then it would hve meant a CS.
I left that appt in tears... went into labour 3 days later.
I know this is a bit different to your situation.
I do think as Michelle said your mind has a lot to do with it. I tied up a few loose ends & went into labour the next day.

As for preparing for CS.. I guess I was just telling myself that it doesn't really matter how they get here, just that they do... that the birth is one day in their lives & there is so much more afterwards to be treasured & enjoyed... that it would be a better experience than the emergency CS as we would be prepared & know what was happening ahead of time....basically trying to find whatever 'pluses' I could. I hadn't really given it much thought until then as I had assumed I wouldn't need one.

I guess the key is to open yourself up to be accepting of things happening however they need to.. .but I know that's not easy. All I could think about was how it wasn't going to my plan, dammit!

I hope whatever the outcome that you have a happy & empowering birth