Loads of information on saving energy and info about renewable energy. Tips for consumers in homes, what's going on in your state, even EERE for Kids.  
 
I was going to post this link on tankless water heaters, but it turns out the whole site would be a lot more useful.  
 
Also see How to Save Electricity (on LF) if you're interested in putting these tips to use. More from EERE on LF.