One of the most important things you can do to prepare for your child is to talk to your wife, now, about the division of labor in the household post-birth. Commit right now to a role and a set of duties for the foreseeable future with a mutual understanding that if something isn't working for either of you, revisions can be made. You can relax on it after a couple years, but there's a lot of adjustment in the first year and this sort of understanding makes a difference.
Equally important, is to have an understanding that you both need time away from each other and the child. Agree now that you will be responsible for the child on specific days at specific times to give your wife time off and have her reciprocate.
Do these two things and you'll have the time to work, take care of your responsibilities and fit in some good hacking time. So will your wife.