Listen to her. No matter how much planning you make HER plans can chance in a split second. If she demands meds make sure you get on the nurses case if they don't get right on it. If she wants a back rub give it to her. If she yells at you to stop rubbing, then stop. No matter what, don't take offense. She's the one going through this, if she doesn't feel like she's in control it can make the experience terrible for her. Look at it this way. Her body has completely gone out of control. She can't stop what is happening. If she doesn't feel in control in other ways it could be terrifying. (worst case of course) Trust that she knows what she needs and wants. You are her advocate to make sure the Dr's and nurses listen to her. My medical personnel were great and listened to me. Some places that isn't the case. You may have to stand up and fight for her. She's the patient and she has the right to deny ANY treatment. Just remember that.
Little note from personal experience - DON'T. I repeat DON'T turn on the game or race. She'll hold it against you the rest of your life.
Also ice packs or hot towels are great for helping her deal with the pain. Foot rubs are excellent too.
If you can pre-register at the hospital do so. Your trip through to the labor room will be sped up a lot.
A tip for mom - On the way home I wore my one piece swimsuit. It gave light support for my abdomin when my guts felt like they were falling out. I even had a C-section and it helped support that so it didn't pull and it wasn't too much pressure on the incision.
I hope any of these help and I hope things go smoothly. Best wishes to the mom.
Oh and March 2nd ! Great day for a B-day - it's my B-day too.