George Clooney is a good example of how private citizens should be doing things.
He selects a cause and then goes on-ground to actually see first hand what is happening and then uses his democratic freedom to try to make changes. He provides funding, he lobbies Congress, he goes as far as to get arrested (for some reason?) to make his point and to bring about relief in Sudan.
Whether you agree or disagree with his causes or his methods is inconsequential. The fact is that anyone and everyone has the opportunity in America to do the exact same thing. Of course, George has access to his personal resources that allow him to take on a very active role in foreign countries and being an actor he also has the celebrity factor to make his chosen causes more prominent in the media.
All individuals have the ability to do the exact same thing in their local community. The freedom to choose to be involved and to push for the social or institutional changes that they deem relevant to them. As we enter this period during the evolution of "engaged democracy" people are starting to realize that they can have access and influence by doing things themselves rather than turning to government for solutions. There is further, no requirement that an organizational component be present.
Government has proven itself incapable of solving virtually any problem in today's modern world and it is up to the self-directed and impassioned American citizen to craft the future of America. George Clooney is doing his part in the societal areas that affect him the most. He does not choose to try to fix everything just the areas that concern him the most. That is truly what freedom is and is the real essences of a new definition of the "American Dream" whereby individuals have the right to be involved in societal development.
The old definition of the American Dream which is predicated on "hard work leading to success" is being usurped by a new Dream "that one has the power to craft the society in which they will succeed". The requirement of having to accept the current roles no longer exists.