Reddit reviews Baby Bargains, 8th Edition: Secrets to Saving 20% to 50% on Baby Furniture, Gear, Clothes, Toys, Maternity Wear and Much, Much More!

Buy this book for your wife - and do it soon. It will help her figure out what baby stuff is important, and what is useless crap.

Get a lot of sleep now.

With any luck, pregnancy will turn your wife into a sex-starved animal. Enjoy it, because the memory of that is all you'll have for a while.

Once the sex does start back up, have fun with lactation!

Let your wife sleep, particularly for a while after the baby is born. Seriously, it sucks, but she will need the sleep and appreciate you a lot. If she's breast feeding, she can pump it into bottles for you to feed the baby with in the middle of the night.

Don't put the baby in your room for the night - not even the first night. Bad habit to get in.

One baby isn't too bad - you can tag out. The fun start with 2 and above.

Teach your baby sign language. I did this with both mine - before 6 months - things like "drink", "hungry", "more" and "tired" are the most useful words, and once they learn them, man they will use the crap out of them. I think a lot of crying/fussing/etc from babies is frustration that they can't get what they need because they can't communicate. There are many resources online to help with this.

A lot of things change in your relationship, post kids. Work through them.

Watch for signs of postpartum depression in your wife. Fortunately it didn't happen to my wife with either kid, but I have friends that had it pretty bad.

Spend time with the baby - They are amazing to watch grow up.

You will learn to hate the word "No".

Not mine but true: you will spend the first year trying to get your kid to walk and talk, and the next 17 trying to get him to sit down and shut up.

Consignment sales are a great place to buy baby stuff/clothes cheap.

When your baby is a bit older, encourage your wife to join a mom's club. My wife and kids made some great, lasting friends from that program.

Speaking of friends - your single and married DINC couple friends will drift away now that you have kids.

Use johnson's baby shampoo on the kid's hair. You will appreciate the results.

On the topic of "what you need", may I also suggest this book: Baby Bargains - http://www.amazon.com/gp/product/1889392332 My 20 week preggo wife loves this book and has recommended it to the other 10 or so people we know that are pregnant. No BS, right to the point. The thing is covered in bookmarks at this point.

To everyone else: If you or your SO are not pregnant already, DO NOT DRINK THE WATER! Some shit is up.

I used amazon, most of my family is out of town so this made it easy for them to look up what I wanted and then they went and either ordered it or bought it somewhere else. I also liked amazon because they seem to have the best prices, and they have a completion discount. Also being able to see what people said about certain things really helped in registering.

I too have all the big stuff, so I registered for things I thought would be useful and not frivolous. This diaper bag comes highly reviewed, and I got it, and it is amazing, so many pockets, so much stuff and its very sleek. This seat is a great investment as you will be able to use it for a couple years, the people who gave the bad reviews weren't using it correctly. Those two things were very high on my list, I got everything I needed, a couple things I wanted are small and I will buy them later, but I highly recommend those two things. People are right about not registering for clothes, this little girl in my belly already has more clothes than I do. She also got more stuff than I could have ever bought her. If you want help on picking out things to buy I would suggest picking up a copy of this book as it has very useful information.