first, sit down and really think about the kind of birth that you want--what are you 'dreaming' of for this birth?
begin to write things down and once you have that, start to figure out how to make things possible for yourself.
after you have a general idea, start to look at it as a 'philosophy' of birth. from there, identify what is most important about this 'philosophy' and then strive to formulate it into a series of bullet-point ideas.
from there, you can utilize this to find the appropriate midwives and doulas (if that is your wish). not only will you ask questions about your fears and concerns, but you should also interview the individual to discover if s/he shares your 'philosophy' of birth and can help make your 'dream birth' a reality.