I am thinking really hard for a wasteful habit, but really I can't come for one right now.

Anti-Eco - Eco

Well, I used to leave the lights on. But since I'm living alone, I'm trying to be the less wasteful possible. May be that, I usually don't buy bags for the trash so when I go to the supermarket I need to buy the bags. So in the end there is a new use for the bags, so I don't think that I could say that I have a wasteful habit.