Thanks for the question. Here are a few resources from throughout the Knowledge Network that can help to answer your question:
In October, we posted a guide to Social Media and Citizen Engagement, which provides some good general ways to get people involved, and explains how there are new ways to measure how effective various sites are.
This Knowledge Network article examines a few different cities and their experiences with social media.
"Connecting through Social Media" offers several tips, measures of success, and examples for the local government official using social media. http://icma.org/en/i..
Earlier this year, there was a similar conversation on the Knowledge Network that included a number of great answers about success through social media.
Finally, take a look at ICMA’s various social media presences for examples.
I hope this helps to answer your question. Please let us know if we can be of any more help.
Knowledge Network Intern