Try to do 2 or 3 different scenarios in it ie
Plan A - if it all goes swimmingly - how mobile to do you want to be, do you want to be monitored a lot or would rather minimum moitoring, what pain relief would you like, who do you want to be there with you, do you mind having students there (if you get there in mid labour you may not be 'sane' enough to decide LOL), do you want the baby delivered onto you, do want them to tell you the sex, or perhaps DH or yourself find out, does DH want to cut the cord, are there any 'personal' issues which they should be aware of (I had a gynological problem which they needed to be aware of during labour), how do you want to feed, what pain relief would you like etc etc
Plan B - if you need intervention - how do you feel about ventouse, forceps, C-section etc etc, 'if' Plan A doesn't go right is there anything you'd still reall like to happen if at all possible. etc etc
Plan C - if things end up totally 'off' plan is there anything you REALLY don't want to happen.
My MW for DS2 was AMAZING at helping me with as much of my birthplan as was humanly possible when I was in labour - I wanted to be mobile and minimum monitoring, as little pain relief as possible, no CS unless 110% medically nessecary - ended up being induced, monitored almost constantly and pumped with every drug going (not that any of it worked!) - however she did her best to make sure I was off teh monitor for as long as possible, the Consultant wanted to do a CS (and by that stage I wanted one too) but she helped DH put his foot down and although it was an assisted delivery in theatre I got my VBAC - and I was SO glad of it.