I'm trying to be more practical in my purchases
Anna, I think this statement of yours is the key, as long as we all get to define practical according to our own preferences, needs, and priorities. For some, it might be spreadsheets and calculations of CPW; for others it might be budget, variety, wardrobe numbers, one in/one out, happiness quotient, responsible consumerism, longevity, lifestyle requirements--and so on. What is practical thinking for one person might be totally at odds with another person's definition.
For what it's worth, and as much as I love calculations and spreadsheets, counting, calculating, and categorizing my wardrobe would be a time-consuming, but ultimately pointless, exercise because I can't see how I'd use the information to create a better wardrobe. I learned the hard way that being logical and systematic about my wardrobe too often leads me towards buying things I theoretically think would be smart buys but which don't work out in practice. My most "practical" purchases have been things that I've fallen in love with in the dressing room, brought home, and wore to death. I can stick to an overall budget, and be responsible about replacing basics and necessities when needed, but that's as far as it goes.