Congrats!
Like
nospleen said, get lots of sleep now!
My little one is nearly 20 months now, and even though he throws more temper tantrums now than what he used to, it's a blast every day!
My biggest piece of advice is to be patient with your wife, because she will likely be extremely emotional from this point on. Keep this in mind at all times, our poor wives have so many hormones running rampant through their bodies, they can't control their moods sometimes.
Also, make sure and be the biggest support as possible. My sister-in-law is pregnant and her husband is a complete jerk.

She has a history of blood clots and shortly after she got pregnant she had a pain in her leg and they found like three clots down her leg. Her husband didn't even take time off work when she was in the hospital, and even though she's pregnant and now in a wheelchair because of the clots, he still won't even go to the grocery store for her.
It's so bad that my wife and I just booked her a flight back home from Texas because she needs to be around people that will actually take care of her.
I don't see this marriage lasting, which is sad since there's now going to be a child involved.
Anyway, there's my advice. It's going to be SO much fun, but nothing will EVER be the same. Your relationship with your wife will change along with everything else in your life. It's not necessarily a bad change, but having a child (and consequently being stressed out constantly) will put a strain on your marriage to some extent.
*raises glass of Dr. Pepper*
Here's to a healthy and happy baby!
**EDIT**
One more thing! This is REALLY important!! Get your wife a Pregnancy Massage. Depending upon your finances (massages can be expensive), try to get her two or three throughout the pregnancy. I got my wife one when she was about six months along and she absolutely LOVED it. It's a great way to pamper your wife and get some brownie points at the same time.
