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Clothes are the hardest category because a garment is rarely just a garment. It is also a size you intend to be, a job you used to have, or an evening you have not been invited to yet. Sorting them by "do I love it?" produces a lot of regret. Sorting them by evidence produces much less.
Start by making the invisible visible
The reverse-hanger trick is the most reliable tool in this whole subject. Turn every hanger backwards. When you wear something and put it back, hang it the normal way round. After three months — and it does need to be three, to cover a change in weather — everything still backwards is something you did not choose once in a season.
What makes this work is that it removes prediction from the process. You are no longer guessing whether you will wear the green jacket. You have a season of data, gathered without effort, and the answer is already on the rail. For folded items the same idea works with a ribbon or a divider that migrates as things get worn.
Sort by function, not by feeling
Take everything of one type out at once — all the jeans, all the knitwear — and lay it out where you can see it together. Then, per item, one of three: in rotation (worn this season), waiting (genuinely seasonal, and you can name the occasion), not honest (kept for a body, a job or a life that is not the current one).
That third pile is where the regret lives, and it needs a rule rather than a mood. A workable one: if it does not fit today and has not fitted for a year, it goes. Keeping a smaller size in view every morning is a daily reminder of failure, which is a high price for an option you can buy again if the day ever comes.
The regret cases and how to avoid them
Regret concentrates in a few predictable places. The first is basics — plain t-shirts, black socks, everyday jeans. These look unremarkable in a pile, get released as boring, and then you discover you had exactly enough and now you do not. Count basics before releasing them, and hold a deliberate number.
The second is formalwear you need twice a year. Low usage but high replacement cost and high urgency when the need comes. Usage rules should not apply here, and it is fine to say so explicitly rather than pretending it is an exception you feel guilty about.
The third is anything released during a big emotional clear-out. Sessions that start with "I'm sick of all of it" are the ones that end in a repurchase two months later. If you notice that mood, sort into the box-with-a-date instead of straight to the donation bag.
The part that stops it recurring
A wardrobe refills faster than any other category, because clothing purchases are cheap, frequent, and driven by mood rather than need. Two habits contain it. One-in-one-out is the well-known one and it works, provided the item leaving is comparable to the item arriving.
The other is checking before you buy, which matters more here than anywhere else because clothing is the single most duplicated category in most homes. Almost everyone has more black t-shirts than they believe, and nobody can recall the number while standing in a shop. If you keep a rough list of your basics — just the categories, just the counts — the answer takes five seconds, and the fourth grey jumper never comes home in the first place.