I think that a decentralized system in which a number of organization each work to do some task in society. The principle difference between this and capitalism is a cultural one. In this system, insatiable greed is not held up as the most holy of motivations! It is not respected, it is not rewarded, it is not encouraged! Seeking to do something well for yourself and your fellow human beings, seeking to be a good person, a competent person, seeking to make a pleasant world for yourself and your fellows is what is respected, rewarded, and encouraged! This is whats wrong with America and a significant chunk of the world. We respect people who make money, who exercise power. We reward them for their efforts, we tell children, "Look at that guy! You should try and be that guy!" And so they do. And we wonder why things are so fucked up.
So how do we accomplish this? It's simple. We need a counterculture. Not the idiot hippy "I'ma drop acid hope everything works out" counterculture, a counterculture of "I'ma clean this shit up!". We need to band together, and assert that things should be different. More importantly, we need to demonstrate how things should be different. We start establishing our small organizations, and we work to make the world work. Not to rob it for every penny we can.