Well, the first thing I'd do is solve world hunger. That's kind of an issue.
Then I'd go through combat training, make an army of Rons, and make sure no one ever had to go hungry again...by force!.
I'd be the greatest humanatarian-who-replicated-himself-something-like-ten-thousand-times there ever was.
Of course, at that point the UN would get a little antsy, and tell me to quit with all the good deeds and goodwill towards men. I'd tell them to shove it, and that I happen to be the strongest force on earth.
This, of course, would lead to a military engagement between the unnoficial Nation of Ron and the US, during which a bunch of other people try to invade the US, but fail because they've got Ron protecting their borders. And the US.
Then all the kooks would come out and try to wipe out life on the planet. I, being awesome, would stop it in some unfathomably awesome way.
Later the United Nations of the world would try again to tell me to stop making them look bad, but I'd tell them that they have one of two options; accept that I'm a benevolent, well intentioned being or try to destroy a force that equates to a hundredth of a million Green Berets with a single intelligence. They, being intelligent, would chose to tolerate my shenanigans.
Shortly thereafter, I would invent free energy, interstellar travel, and set up another inter-country peacekeeping thing, composed entirely of Rons. Mankind would flourish, all thanks to me. All ten thousand of me.
...or I'd just play Super Smash Brothers. One of the two.