The one thing we learned with the first one is that it takes a tribe to deal with a newborn: I simply don't understand America's desire to go it alone with newborns. I've got a list of grandparents, siblings and other assorted people coming through and staying with us for the first six months after her arrival.
After that, we're seriously considering splurging on a nanny... I like to think of it as an investment in my sanity.