What can a citizen do to promote the common good?
A responsible citizen can report the common good by putting away there self interest and putting the common good before them. A good example is to help some fellow citizens by help cleaning up around your community. Another way is to start a club supporting the common good every one would want to join and it would make are government be the best there is.
Common good is putting whats right in front of what you want (self interest. By using the common good (what your supposed to do it) will help every one instead of your self.