I've recently made some changes. I have a small car, I park it on the street. I don't have a sofa, I have two Barcelona chairs. I left a job in the showroom, now my office is at my cluttered dining room table. But. The home office is killing me, so here's a bit of inspiration.
Treehugger founder Graham Hill has part of the answer: we need to have less stuff and live in smaller spaces, like the 420sf (~39 m2) apartment in New York City he will renovate in 2011.