Embarrassingly, mine is just hand written on piece of pad paper! However, I'm not really a plan it out person. I've just put in what pain relief I want, how involved I want OH to be and whether I want a managed third stage.
There are loads of suggestions on the nhs website if you Google birth plan, but to be honest I have no idea how labour is going to affect me so how I'm supposed to suggest what position I want to be in is beyond me!