My wife is having a tough time adjusting to motherhood and is cranky most of the time. I know she is going through a lot and I want to help her. What should I do to make her happy?

You can help your wife by doing the house chores, so that she doesn't need to worry about it. You can also take care of the baby for a few hours so that your wife can sleep/rest. If your wife is breastfeeding, offer her water and also bring her some lactation goodies.