You may have an idea of that or you may not, yet.
What I have for you today is a video, it's a bit long because it's a TedX Talk but I think it's well worth your time to watch it all the way through.
Even if you don't want to do what this young family did, and most won't, there is still a lot to be gained from this.
I'm off to clear out my shed and start selling the crap.
Let me know what you think.