At least change electricity bulbs in your house. Everyone should be involved. Thumbs up the video.
Also you can check a lot of internet flash games related to eco-system. For example these games.
There is also a game which will be out in 2011 which whole subject is Ecology and disastrous state: Fate of the World.
P.S. You can comment out what exactly do you think we could do, to save the planet, but something doable which depends on us, not those big corporations.