I think one way people can get involved in the decreasing energy use from the biggest polluter in their lives, their homes (thought I was going to say cars didn't you? ), is to create a a central system where everything in the house can be controlled. It's a known tendency for us to enjoy controlling things in our lives from one place....ipod for all our music, lights and blinds and speakers from one place, entertainment system that controls TV, DVD, gaming, etc...
Why not have the same degree of control over our homes. It would not be terribly advanced technology to monitor the heating, windows, insulation, and electricity that's on in the house for one central place that tracks usages over time as well as up to the minute cost analysis. If people could see in real time how much energy they're using, and how much money a 5 or 10 degrees on the thermostat it costing them, they would automatically adjust to find the best of both worlds, energy/cost efficiency and comfort. There was something about this in the New York Times today:
It's not the only solution, and it certainly isn't enough by itself. But it's a start.