My waters broke 10 days before my planned C section. Luckily I had asked the MW 'what if', and followed her excellent advice. Which was - go in as soon as you suspect something may be happening (show, waters breaking, pains, etc) - ignore any standard advice about staying at home to 'wait and see', or take a warm bath and paracetamol etc.
You basically want to avoid a scenario (assuming you want a C section) where things progress so fast that a C section isn't an option. This is pretty rare but can happen, obvs. There's a thread about it on the board atm.
I was assessed, told to come back the next day, and simply had my C section when there was space in the theatre. I had a bit of a wait! but was not in labour, not uncomfortable, so it was only having to be nil by mouth for a long time that was a bit of a trial.
It is worth discussing with your MW, and also recording what your preferences are. My MW was aware of my personal circumstances, why I was having the CS, and was very supportive. I actually had it written in my notes that I wasn't prepared to give VB 'a go', and she said if any MWs on duty pressurised me in this way, to refer them to my notes and tell them they'd have the Head MW to answer to if they carried on!