I got the Peter Walsh book from the library & read it & think he makes some very valid points. First, to carefully consider AND discuss what you see the purpose of a given room ideally is to focus & solidify decluttering efforts. The only negative noted was that perhaps because he's from Australia he never mentions Freecycle as a swift, painless way to remove discards. I know from reading local boards here that people will take just about anything, items it's hard to believe anyone bothered to post, but they are swooped up. For someone with transportation issues, lots of small children, health problems or other reasons it's hard to get rid of your bags & boxes of junk so Freecycle is worth a mention imo.