Couple counselling is always a great idea - you know, how a baby changes and puts strain on even the strongest relationship.
A weekend away for her - with 2 of her girlfriends when baby is 3 months old. You stay home with baby.
If you do not have one - a full time maid for one month - or forever, which ever you can afford.
A night nurse from week 2 - 6. She will argue with you about it, but trust me when she has a full nights sleep and is not going insane, she might fall on the floor and kiss your shoes.
An afternoon of hair, pedicure and manicure when baby is 3 weeks old - you arrange to be home with baby from 12h00 and send her with a friend to go out and have a peaceful afternoon.
A voucher that you will get up for the first 6 weeks for Friday and Saturday night so that she can sleep through the night. (She has 5 other days where she is doing it, 2 days off will mean sanity for her.)
Read a few books written by women (or blogs) regarding how sh&t we feel in the first three months. Learn and listen - suggesting sex, suggesting anything that means you are on a couch watching rugby, suggesting you are tired, suggesting you really need a break - is not a great idea.
That alone can be a gift in itself.
Promise you will not work late for the first 6 weeks, - actually arrange to leave work early - so you are home EVER day by 3pm to help with the dinner/fetching other child/cleaning/bathing baby or what ever.
Whether this is your 1st, 2nd, or 15th, I can guarantee your wife loves you, but at some point is going to want to kill you and bury you in the backyard. The fact that you know this, the fact that you can have empathy (and some understanding) for what she is going through physically/emotionally or what ever is so HUGE - I would take that as a gift any day.
Stop me - if I am giving you too much in the way of suggestions.
I wrote this post quite a long time ago ... it might still ring true.
reluctantmom.wordpress.com/2010/10/22/th...ath-water-%e2%80%a6/
Congratulations on your second child, I hope everything goes well.