You could try reading this book on infant sleep, that book on baby care, and the other book on solid feedings, but if you are anything like me half the important stuff will fly out the window in the midst of sleep deprivation anyway. I found out after my daughter hit one year that I had helpfully saved information on newborn growth spurts on my computer somewhere when I was pregnant and promptly forgot about them. I rediscovered growth spurts at 3 weeks post-partum when I experienced my daughter's second and most epic spurt and I will now never forget them. Book learning has nothing on experiential learning.
Instead of trying to learn about babies now, I recommend trying to figure out what type of person you want to raise. Get the big picture in mind - what person to you compromises a good citizen and good moral human being? Then strive to be that person. Why? Modeling is the most important thing in training children. Under the pressure of parenting the morals you have will be more tested than in many circumstances, so you want them down pat now. Second you want to figure out how, exactly, you guide a little human being who begins life not even being able to control his or her limbs into a good moral person. Get that big picture in mind. That would help.
I'd also underscore the financial element of Chrys's answer. Children are expensive and you will appreciate being fiscally prepared.
Finally things that I wish I'd done before pregnancy and did not do:
1) Sleep - everyone tells pregnant moms and their husbands to sleep. By then it's too late. Do it before pregnancy. Sleep like you're a college kid on winter break. Sleep enough that you have about a 2 years' supply of extra sleep. OK, you can't really do that, but it sure would be nice.
2) Take that blow-out vacation you always wanted because it's not going to be so simple again for decades. We only did one of our dream vacations and I wish we'd done more.