The best thing you can do to spread the word is to live the lifestyle. Drive an electric car. Live in a energy efficient home. Write to your representatives every 3 months. That will be strange enough that people will ask you about your car, your thermostat and your solar panels.
When asked, tell them why you do it. Tell them how much money you are saving. There is no need to be preachy or seek out people to convince. The best way to have an effect when you share is to talk about your own progress towards a zero emissions lifestyle and only when asked. Do you know someone who is interested in going renewable? Feel free to send them here to get started. You never know… It Just Might Work!