For me, having a good attitude towards the environment is realising that "the environment" isn't somewhere else - it's where you're sitting right now. And part of that realisation is how certain actions - those that we take for granted - have a knock-on effect. The electricity used to read this webpage has to come from somewhere - from fossil fuels, nuclear, hydroelectric or maybe wind. So there's a chance that reading this page has caused chimney somewhere to pump a few more particles of CO2 into the sky. When you wash up or flush the toilet, the water has to come from somewhere - and go somewhere else.
While this amazing video by Norwegian band Röyksopp doesn't actively promote a green message, it really struck me on how well it illustrates the interconnectivity between things - even at a mundane, domestic level. There are no isolated actions...