How can I stop buying clothes so often?

Recently, as I've been trying to get more into fashion, I've been making more trips to charity shops and other places that sell clothes, or of course just browsing online on places like Vinted, which has led to a lot of buying clothes. I'll say that I've got enough clothes for now but it wouldn't be too long before I start buying again. How can I stop myself from buying a lot of the time?