General Information:

How to do a home energy audit (student website)

Information on the subject of CFLs (student website)

Michael BueJay's guide to saving energy Chock full of info!

Wikibooks page on "How to reduce home energy usage"  

HowStuffWorks' explanation of "How Power Grids Work" 

Humboldt Area:

Redwood Coast Energy Authority : a local non-profit dedicated to energy efficiency with lots of resources and workshops! 
Campus Center for Appropriate Technology (/~CCAT ) A long standing HSU tradition, now home to energy-efficiency books and resources, donated by Green Campus.

State/National:

California's Flex Your Power program

Alliance to Save Energy:
Nationwide non-profit that promotes energy efficiency worldwide through a variety of programs.  They offer many resources and administer the Green Campus program.
http://www.ase.org/
Links to all twelve Green Campus Programs statewide.
http://www.ase.org/section/program/greencampus/

Energy Star: Energy efficient compliant appliances, advice on computer power management, efficient facilities and buildings: http://www.energystar.gov/

 The Department of Energy's Energy Efficiency and Renewable Energy (EERE) Program http://www.eere.energy.gov/

American Council for an Energy Efficient Economy http://aceee.org/  

Energy Information Administration - offering official energy statistics from the US government