A Birth Plan. One of my top reasons for birthing at home: A woman in labor should NOT have to worry about anyone but herself. Should not have to tell "caregivers" to back off. Should not have to "enforce" her birth plan.
I wish I knew this information the first time I gave birth! I got to the hospital WAY TOO EARLY! Which led to things I didn't want like - pitocin, and not eating, and monitoring. Next time I'm doing things different!