The First problem is that the citizens have senses of crisis and motivation to change it better, but they don't have any goals. The Second problem is that individual motivation wouldn't work out well to stimulize the city.
First, make a huge civil gathering where motivated citizens present their opinions and ideas. Second, make it so big that it will appear on the media. Third, collect sponsers who will support the citizens' idea (since the congress will be on media) Four, progress the projects and revitalize the city.