CONGRATULATIONS!!
The only regret I have from my first birth was NOT hiring a Doula! (I would absolutely contact ASB's wife right away.) I wish we had hired one. I thought I wouldn't need one with my mom and husband helping. However, my unmedicated waterbirth with midwives turned into an 80 hour labor that ended in an emergency cesarean. I would have loved to have a Doula walking through that with us.
I read a huge amount of books including one each on Lamaze, Birthing from Within, and Bradley. Bradley was way wrong for my soft spoken husband and our relationship. I also took every class at every hospital that I could find.... Infant Massage, Breastfeeding, Prenatal Partner Massage, Daddy Bootcamp (well DH did this one), Prenatal Yoga (LOVED this), child and infant CPR, etc.
`One of the best books of all time that I read was Ina May's Guide to Childbirth. I'm not one to go live on a commune but I found the book both inspiring and empowering. Another terrific read is Henci Goer's The Thinking Woman's Guide to a Better Birth. It gives you pros and cons of many many options that you will be presented with when giving birth. It's nice having a plan of what approach you want to pursue ahead of time because in labor your brain will be focused on what you are doing and not what you think about XYZ.
Last piece of advice I would give is that you can't control birth. You have to go in to this process knowing that you will make choices that influence your results but ultimately you have to trust your instincts and surround yourself with people who fundamentally approach birth the same way you do.
Having a baby changes you in beautiful ways you can never imagine before experiencing it. You will give of yourself and sacrifice in ways that will make you a better person. It will take everything you've got to raise a child well but the journey is infinitely worth it.