It is all about the things you bring into the house and the things you throw out of it again.
Bring in all of your food and other new things with as little packaging as you can and aim that the only things that go out are in recycling bins!
And the things that you do already have, keep if you do not need to replace them, if they still work for what you need and they are not really broken in some way. It is really easy to just buy new things and then have to throw out the old ones that are still really good. In past times people did not throw things out the way we do now and that is why we have antique and old things, there will be very little left from these times for people in the future to buy as antique I think.