1 )Be sure to *master* the MS Office suite. You've probably gained some exposure to it during your curriculum, but you should really master it. I think anybody here is smart enough to do so. It just takes a couple of hours to do so.
2) Athletics. I wasn't in athletics myself, but I learned in my job search post-college that employers are interested in this. They want to know if you're a team player. Everybody claims to be a "team player", but an athlete's level of operating in a team is usually greater than a non-athlete's. This is a generalization. I know.
3) Sales internship. Enough said.