One of the most important of the government reform NGO's in our nation's capital is the venerable Common Cause. They are all about how people can improve our nation's democracy, and they fight the good fight against Washington's latest ethics breaches.
In deference to their perfectly complete article, I encourage you to go to Common Cause Georgia's recent post entitled "Tell 'em what you want." It concisely lays out what you need to know before making that call to your elected official about a critical issue or problem.
It's written by their interns Lindsay Jacobs and Rachel Bradley and accepts comments.