What helped me the most was watching a dog I had taken in as a foster pet give birth to puppies.
I am not kidding.
This little dog waited for me to get home from work (back when I was a vet's assistant) and the second I came home, she led me to the laundry room/birthing area I had set up for her. She started panting, did a lot of walking around, sitting, getting back up again etc, and during this time she popped out three perfect little pups.
2 weeks later I found out that I was pregnant with my first child, and even though I was just a baby myself (19!) I read up everything I could on pregancy and childbirth. The thing is, you can't fight your uterus. You've just got to let go and let uterus, you know what I mean? 😀
I had my first 2 kids naturally, no pain killer. You have to be able to accept the pain and ride the waves... a lot of it is mental. If you don't think you can do it, don't be a hero!
For my third, I requested to be pain free. It was fun. 🙂 When transition came, I was like, "Hey! I think I'm in transition! " as compared to with my first two, when all I could manage was something like, "Uuuuuuhhhhhhhnnnnnnnn ahhhhhh ahhhhh"
Do whatever is going to make it special for you... period. Just keep io mind that having a baby IS excruciatingly painful, and no technique will take that pain away. You have to ride it out or request an epidural. 😉