first is phone banking- I have to say it's hard but necessary
http://tools.hillaryclinton.com/calling/Second got to www.hillaryclinton.com click on states, select your state, say Virginia, click on volunteer in Virginia.
go here
http://www.whitepages.com/ , type in hillary clinton in the business search area, add the state, click search.
the VA search brought up an office in Arlington VA. If that is not convenient for you I'm sure they'd have another office or way for you to help. Their # is 703 463 2008
I'm busy working on Maine in return for some kind help we got from Mainers back in early Jan.