[Alfirin]

If I was Aragorn, (or for that matter Faramir sice as Price of Ithilien Mordor is now directly on my border). There would be A few MAJOR things I would do before I let anyone live in Mordor. The end of Sauron left a lot of little dangers left in Mordor and I would definty not want to leave any of them lying around for some other dark lord wannable to find.

First and Formost I would send a VERY large, VERY well armored and armed Group of warriors directly to Cirrith Ungol to make sure Shelob is dead or to kill her if she isn't If she is alive she I just too great a risk to live next to especially since they is always the chance that with not orc sacrifices to feed her she could develop Ungoliants ablity to make her own darkness and migh leve the caves to go hunting in the land at large.

Secondly I would see that the ashes of Baradur were CAREFULLY sifted to confirm the destruction of such items as the Ithil stone (I wouldn't want some other person with acess to a Palantir without my knowledge.) Similarly though it is not directly in Mordor I would establish a Garrison to put Amon Hen and Amon Llaw back into service.

Thirdly (and admittely least importantly I would forces to do some serios civic improments such as clearing all the thorns of Mordor and making a few more roads

I can proably think of more things later but thats enough to start