I think Earth Hour is a really good concept. In Christchurch the hour without power was successful and certainly got people thinking. However, is it a case of 'now we've done it we can forget about it?" What would happen if we had an earth hour every week? Or even better, if we changed our habits to reduce the amount of energy we waste full stop. If you don't know how to do this just google "Power saving" and you will find many sites to help you. You can narrow the search to your own country or particular types of power saving. For example, in New Zealand there are many sites, including http://www.nzs.com/new-zealand-articles/lifestyle/power-saving.html
My goal for this week is to be much more vigilant about turning my computer off at the end of the day. What will yours be?