When I first found out my best friend was pregnant, she was very into Ezzo.
She still spanks, and thinks that it is Biblical.
However, just by being there when she needed me - by being her friend, she is nursing her newborn, co-sleeping, and baby-wearing.
She is gentler with her oldest, and will ask for advice. She doesn't agree with my POV on spanking, but she sees my kids and likes the results.
Just be there. Model it for her, and pray. I wouldn't even send her anything until she has a baby shower. Let her know that you are excited about the baby, and confident that she will want to learn how to be the best mom you can be. Once she knows that you believe that about her, the stuff you send will make a lot more impact.