This app was mentioned in 5 comments, with an average of 2.40 upvotes
I'm a dad of 7 month old girls. There's some great apps for the phone that will help you keep track of stuff. At first we were logging every feed (and how much they ate), every diaper change, every vitamin D drop given, etc, but these days we just log the essentials like milestones, weight and height, and vaccinations. If you're worried that you won't be able to keep track, it's a great tool. My wife and I have Android phones and we use Baby Connect. We're both able to access update the logs for the twins.
Of course, you could just keep a log, but if you find you're on your phone a lot anyway, then why not use an app?
Good luck!
We started with an Itzbeen and used it for the first couple months, then my wife and I both got android phones to replace our blackberries and we dropped it in favour of the Baby Connect app.
It lets us track and record everything we could ever think of and our favourite part is that it all syncs between our phones so we always have an updated account of what's going on.
Day one out of the hospital, if I recall. Everything about a baby is repetition and routine. Bed time is bath + settle down time (mommy baby snuggles, usually) + nursing/bottle + storytime. Each meal is the same, as best as possible, each day. It's super cliche to say it, but with a kid, failing to plan really is planning to fail.
Your wife isn't entirely wrong (and you should just tell her she's right anyways), just know that the longer you guys take to get the baby into a schedule, the tougher it is to break what has essentially become the baby's schedule.
BabyCenter is a pretty good resource on how to start a schedule. Let your wife be a mom for a little while, then when she's on her second week of sleep deprivation (because you've probably gone back to work by now), clue her in to this kind of information - http://www.babycenter.com/0_the-basics-of-baby-schedules-why-when-and-how-to-start-a-rou_3658352.bc
Help her out with anything you can do, because remember you can do everything but stick your nipple in the baby's mouth and expect milk to come out of it.
Oh, and comfort the shit out of her the first time you guys let him/her cry it out, if that's something you're going to do. 3 minutes will seem like 30, and you'll both probably be a mess.
I'd also recommend tracking...everything. We used an app on Android called Baby Connect to track bathroom stuff and every ounce that came out of Mom and into baby (as best as you can).
Edit: Also tracks sleep. I can actually go back and see all of that information.