Everyone should know about Transition Towns. They are local initiatives designed to galvanise local action to reduce a locality’s carbon footprints and energy usage. There are currently dozens of towns active in the UK, Europe, USA and elsewhere.
The Transition Network (an umbrella body in the UK) publishes a full-size manual on how to start up a Transition Town initiative, and provides training and an annual conference. And it links you to lots of friendly, helpful, enthusiastic people.
Most of all, they make me feel like someone somewhere is really doing something that everyone can join in with.