Classroom Management

As I prepared my PowerPoint presentation for EDTE, it became obvious to me that classroom management was  the theme.  Not only will my future classroom need to have 'no whining' and 'no tattling' rules, but I will need to be consistent with enforcing these  rules.  This leads me to the question of how to teach 3rd graders to manage conflict themselves without involving me.  When do I step in; where is the line?  Unfortunately, I don't have the answers right now.  All I know is what I don't want for my classroom - whining, tattling - and what I do want for my classroom - peace!  How to get that...well, I'm hoping they have a class for that before I finish college! =)