How to contact your State Representatives and Senators

House of Representatives
http://www.house.gov/representatives/find/

The Senate
https://www.senate.gov/reference/common/faq/How_to_contact_senators.htm

How to format a formal letter to a Representative or Senator

http://www.scstatehouse.gov/studentpage/Who/sample_letters.shtml

Sample Letter to an Elected Official from the American Library Association