To me, earth hour isn't just about switching off for an hour. It's a reminder of previous time, when we didn't have all the comforts we have now, and when we didn't have electricity. I think most people on here do all the things mentioned above, of course we switch stuff off when it's not being used, and fill the washing machine full. Personally, I used the earth hour to remind us of what comforts we have and that we shouldn't abuse it them/our environment too much.
Beth