Reagan was the first President to be shot while in office and survive. That's already awesome, but the story gets ever better. After being shot by John Hinkley, Reagan still had enough strength to crack jokes as he was being wheeled into surgery.
Reagan ending the Iran Hostage Crisis the day he was inaugurated.Okay, so he didn't really do it himself, but the fact that Iran decided to just hand over the American hostages back to the U.S. the day Reagan was inaugurated may tell you something about how Reagan's opponents really viewed him.
Talks to release the hostages were basically completed by Jimmy Carter before Reagan was elected. Iran just kept them until after Reagan was officially inaugurated in order to further humiliate Carter.
His summits with Gorbachev brought a peaceful end to the Cold War when many political experts thought that such a thing was impossible.