You'll notice the country has a severe shortage of construction. I try to buy as much as I can, it'll take a little while though. I'm told supply units help rebuild cities and things though I'm personally not 100% sure, cant hurt to start a few though. Apart from that I cant think of anything different than what you did to your first country, employ your population, get your education going etc. A few war hospitals will help the population recover quicker. The rest is just time and patience.
Crafty