Bush initiated the "War on Terror" after the 9/11 attacks and led the hunt for Osama Bin Ladin. Just because Iraq and Afghanistan weren't able or willing to root out the organized bands of terrorists there, doesn't mean Bush did anything wrong by taking the war there!
He also stood good moral ground against the liberals who tried to insert their fake civil-rights agenda into politics while America was preoccupied with the war on terrorism. They didn't give a whit about getting rid of terrorist organizations, they only cared and care about their own manipulations. Bush cut them off with just a few words, and continued to focus on America's national security. Obama has done the opposite on all counts.
So, Bush stands as twice the man who has replaced him in the White House, and better than Clinton ever was as well.
Other than those good things, I'm sure there are many others Bush has done. But then, at the time, a citizen could go about his daily life knowing there was a good strong man in charge of this Nation, and thereby leave things up to our Congress and President. Today, it's not so. We are forced to try to police our leaders ourselves because they're not dependable.