A collection is not a rotation. Most people own between six and twenty fragrances and genuinely wear three of them.
Start by admitting the shape of it
Look at what you actually wore in the last month, not what you own. Almost everyone finds the same thing: a heavy skew toward one or two, a handful worn once, and several that have not been touched since the year they were bought.
That is not a sign you bought badly. It is a sign that nothing was prompting you.
Give the quiet ones a job
The bottles that go unworn usually have a narrow slot rather than no slot. The dense amber is wrong for a warm office and right for a cold night out. The sharp citrus is wrong for dinner and right for a hot morning. The problem is that their slot comes up rarely, and when it does you are not thinking about them.
Assigning an occasion to each bottle, even roughly, is most of the work. It turns "which of these twelve" into "which of these three".
Rate honestly, especially the disappointments
The most useful rating is a low one. A bottle you rated poorly in humid weather is information; it stops the same mistake in August next year. People tend to rate only what they loved, which produces a collection where everything is excellent and nothing is distinguishable.
Let something else remember
The reason rotation fails is not ignorance, it is that nobody wants to run a matching problem before coffee. Wear history is the part worth automating: not what to like, but what you have already had this week.
Do that and the shelf stops being decoration. You end up wearing more of what you own, and buying less of what you do not need.
