For an eight-step "cure" for your apartment (or house etc), check out the Apartment Therapy book. For details, go to http://www.apartmenttherapy.com/book. As you can see, there is a website too, with lots of great ideas.
I got this book from the library, and read it quite quickly from beginning to end. I haven't done the 8-week cure myself, but after reading it I've been getting rid of a lot of stuff that I don't really need.... eg, a big stack of Vogue and Harpers Bazaar mags that I gave away (after I tore all the inspirational pages out to keep in a folder). I was already doing a lot of the stuff mentioned in the book, but it had lots of ideas that I could adopt, too. Now my partner is reading the book, and he has a much bigger household to contend with!