American Psychologist Special Issue on Pyschology and Climate Change and in particular the article Dragons of Inaction by Robert Gifford is very useful for interaction design of the Internet solutions we will develop
Hardin, G, (1968). Hardin's paper The Tragedy of the Commons is one of the most cited in the social sciences. This URL collates the article with a number of other key related articles, including importantly Elinor Ostram's work on real life examples of communities which successfully manage a commons.
MacKay, D. MacKay's openly available book 'Without Hot Air' was very timely when it was published as so many people were making huge errors when trying to calculate the contribution some new initiative would make. The book is comprehensive and makes the numbers easy to understand. Remember, unplugging your mobile phone charger when it is not charging your phone is most definitely not going to save the world! http://www.withouthotair.com
http://wiki.lesswrong.com/wiki/Bias academic community discussing the art of making rational decisions (link here is to thinking about whether to act on climate change).
http://okfn.org/ have many projects on the go e.g. open spending/where does my money go