I agree with the pp, that knowledge is one of the best things because the more you know the less you have to be scared about.
My OH read and researched a lot by himself (online and I bought him "What to expect when your wife is expanding" which is more of a funny book) and we both looked up what was going on every week in the pregnancy so we were both involved with learning. He also attended the birthing classes (our hospital had really great ones that were really informative).
If you plan on breastfeeding, research about that too because for some people it is easy and the baby picks it up like a dream, but for some people it is very difficult for mom and baby and since you never know which one you will be, it helps to be prepared.
Know right now who will be allowed in the labor room and MAKE SURE everyone else is well aware! (It's hard to tell your MIL you don't want her in there when you are 8 cms dilated and in pain!)
Don't google anything during your pregnancy about your pregnancy, labor or baby, you will only scare yourself!
Also, be prepared for ANYTHING! I wanted an all natural birth and thought I was fully prepared for everything that would happen. At first everything went well, I labored at home for as long as I could med-free using techniques I had learned about but after a long labor and pushing for awhile she got stuck and I ended up needing an emergency c-section. I had not researched anything about a c-section (it was the absolute last option on my birth plan!) and I was very unprepared and scared because I had no idea what was going on and no one really had time to tell me because they were all in a hurry and concentrating on the baby so it was a horrible experience that would have probably been better if I had known more about c-sections.
Since you are from the U.S. I will say to make sure you know all about your insurance and what costs you might have to have. We had planned on an all-natural vaginal birth but ended up with an emergency c-section which ended up costing $36,000.00!!!! Luckily our insurance covered most everything and we are working out a deal with the hospital for what we owe, but we were not financially prepared and it would have helped if we knew more in advance.
This is not really about labor, but more about pregnancy. I took pictures every week of my bump and even though it didn't seem like a big deal then, I am soooooo glad I have them now to keep!
Basically research and educate yourself so you feel more prepared. Most of all, enjoy your pregnancy!