Committing the ultimate 'oops' at work is embarrassing.  We all can and do make the stupid mistake now and then.  You can't hide it, hide from it, or pretend it didn't happen.  Some people will understand and forget, some won't.  It's up to you to make sure it doesn't last.  It's important not to dwell on the mistake.  Be proactive--follow the steps suggested by PayScale Career News.