This AG website offers a free subscription newsletter. I have subscribed to this one and a few others. I find it helpful to get a regular prompt to re-focus on ‘the issues’.
Another interesting one with a different approach is –
[url=http://www.cbsm.com]Fostering Sustainable Behavior[/url] – Community-Based Social Marketing by Doug McKenzie-Mohr Ph.D. Environmental Psychologist.
Lots of ideas about how to influence community behaviour to become more sustainable.