Just one quote, which I thought was worth the price of the book (emphasis mine):
"When you come across something that's hard to discard, consider carefully why you have that specific item in the first place. When did you get it and what meaning did it have for you then? Reassess the role it plays in your life. If, for example, you have some clothes that you bought but never wear, examine them one at a time. Where dd you buy that particular outfit and why? If you bought it because you thought it looked cool in the shop, it has fulfilled the function of giving you a thrill when you bought it. Then why did you never wear it? Was it because you realized that it didn't suit you when you tried it on at home? If so, and if you no longer buy clothes of the same style or color, it has fulfilled another important function - it has taught you what doesn't suit you. In fact, that particular article of clothing has already completed its role in your life, and you are free to say, "Thank you for giving me joy when I bought you," or "Thank you for teaching me what doesn't suit me," and let it go."