Kiss sex, and sleep good bye for awhile. In all seriousness it's tough on the mother. Be prepared to see a different side of her, and yourself. This changes you in so many ways.
Didn't you guys just get married like a year ago? Maybe time is flying, or I'm just getting really old. I would recommend to you to continue building your relationship with your wife.
It's very hard to break away from a newborn at all(and you reall dont even want to), to continue building a relationship. Don't let the baby completely derail your love affair with your wife.
You've got to find a little time here and there to date her, and build on what you had before. That with building your family time is the key to success.