U.S. EPA Business Roundtable's Climate Resolve Initiative, with link to materials prepared by Energy Star (geared to businesses but much is relevant to local communities, too):

http://www.businessroundtable.org/TaskForces/

Additional Energy Star Resources (geared to businesses but much is relevant to local communities, too):

http://www.energystar.gov/index.cfm?c=business.bus_index

Flex Your Power Guides:

http://www.fypower.org/inst/case/

State of South Carolina's 2000 Preparing an Energy Element for the Comprehensive Plan: