Every month, I share my budget into 'the appartment loan and the factures/taxes', 'money I want to save', 'money I can spend on whatever I want'. Usually, it's clothes, books, CD...
I don't have a very large wardrobe, but they are all clothes I've chosen carefully, love and take great care of.
I will never buy 4 cheap quality tee shirts 'because they're on sale, that's too cool' if I don't need them. I don't buy something if I don't 'need' it...well if I'm not sure I really want it and if I can't picture myself in it.B)
I love Chloe's handbags and shoes, Chanel's bags, Zac Posen, Jenni Kayne, Burberry Prorsum, Marc Jacobs but I try to buy on ebay.com (thanks to the difference between euro and USD, it's cheaper for european people to order in the USA) or when it's on sale.
Ebay.com is great because I can get 7 for all mankind, Siwy or Hudson jeans for much cheaper than if I buy them in France (the price is at least 4 times more expensive in France than on ebay...). And sunglasses and handbags. The jetlag is pretty hard when a bid ends at 3 o'clock in the morning but it's worth it!
Revolveclothing is a great online store, free shipping and there are often sales.
I really take care of my clothes and accessoires so I keep them a very long time (I still wear the Levi's 501 I used to wear in higschool - 12 years ago - and everybody keep asking me where I found a 'almost new vintage-looking jean').
I take care of my cheaper clothing (H&M, C&C California, Splendid, AA...) the same way I take care of my designers products and I mix&match.