Ahhh fatherhood. Bring a change of clothes for you to the hospital when she goes into labor, because your gonna crap yourself when you child is born
Its truly amazing, but here is something I wish someone had told me, for the longest time its going to get frustrating because being a parent to a newborn is completely thankless. You get nothing back, you spend hours upon hours, calming them, rocking them, feeding them, and soothing them, and guess what you get nothing back from them, its like you dont even exist.
On the surface this may kinda seem obvious, but when its 3 am and they are acting like they have colic it really wears on your mind, but let me tell you this...Hold on, cause one day (6-8months later) you are going to go into their room, walk up to the crib and they are going to smile and know exactly who you are and my friend, there is no better feeling than that.
After that point you finally start to get some emotional response back and it makes everything worthwhile. So my advice is in the beginning just be patient and hold on, cause once they start that change, something new happens everyday. Now I have one son and hes going on 2 so I dont have years of experience to give you, but I do know where you are and what the next 2 years have in store for you.
Past what I said above, the parenting is easy, the biggest advice is have things done ahead of time. Anything you can prepare ahead of time will save you when its go time. I always had diaper, wipes, powder, and change of clothes on the changing table and all his bottles ready to go ahead of time. We had to use special formula cause he had stomach problems so if you and your wife have decided to take a more natural approach then that rules that out, plus saves money!!!!
Now the mother. This is going to be a great time for the both of you, but she is going to be going through something we cant understand. Just be there for her and shut your mouth. Put your crap aside and realize that there is something way bigger going on here and it should go easier. But dont confuse this with hiding your emotions, always be open and honest.
Well I hope this helps, this is my experience from my small corner of the world. Have a great time and congradulations.
PS- When you pack the suitcase to go to the hospital, remeber food for you, water, and crackers and light snack foods. The hospital I went to charged me $15 a meal.