Go The Extra Mile Meaning

(idiomatic) To make an extra effort; to do a particularly good job.

Example: 1982 April 21, Steven R. Weisman, "Reagan Vows To Go ‘Extra Mile’ to Get Accord on Budget," New York Times (retrieved 29 July 2012):
  President Reagan pledged at a news conference today “to go the extra mile” to compromise with Democrats.
2006 Sept. 7, Tony Karon, "Why Iran Has the Upper Hand in the Nuclear Showdown," Time:
  The international community demands that Iran go the extra mile to satisfy concerns over its atomic energy program.