Find a brown ribbon winner, and try to turn that entry into a entry that is excellent. This does not include disqualified photo's, or your own Brown ribbons.
For those that don't know, a brown ribbon is the honor bestowed upon the image that places last in a challenge. Its a dubious honor, but one that has achieved some measure of cult status.
You should reference the last place entry in the details on the submission page (use a thumb tag).