The Opposite of Good is Apathy (tags)
Hold your vigils and marches in relevant places: such as warmongering local Congressional offices. So many Senators and Congresspeople come to mind. Or in front of a recruiting station. Or Federal Buildings. Or military bases. Then instead of going home and cracking open a beer, or uncorking a bottle of wine, sit down and say "we aren’t leaving until you call for an immediate end to the occupation of Iraq." Put your butt on the line for humanity.