Watching this can change the world. It does make me ill.
The secondhand market should be huge and top of mind. Furniture stores should have 80 percent of the store used goods. Craigslist, etc, is fun but frustrating. I'm not particularly picky or fearful, but person to person is just inefficient.
Also, people have been sold on needing everything to reflect themselves and their tastes and knowledge, sort of catalog/review envy, I feel it myself. But you know, it's just a chair or a shelf or a food processor or a jacket or whatever: try to embrace serendipity :) They have pens at goodwill, a bag for $2, and it's all kinds and brands and it will cover your household needs for years rather than leak and rot into a hole in the ground-- that kind of thing, just consider it as often as you can. Once you have that down you will find you need less stuff because you are not using it to represent yourself, just for it's actual purpose, and you will find it easier to pass things on as well.
Just my drunk advice