Have you taken a close look at your household consumption lately?
I do regularly as we seem to collect a ridiculous amount of stuff. I religiously purge as we go and always make sure that the recycle bin is full. I follow the reduce/reuse/recycle philosophy by buying things with minimal packaging. One of my pet hates is green grocers who think it’s a good idea to cling wrap vegetables and place them onto a foam tray – avocados, bananas. (Is it just me, or is that just the most stupid idea to have evolved this century?)
I was thinking of introducing a new weight management system for the house involving a set of scales at the entrance for stuff brought home. Bring something new into the house, then offset it with something else you take out.