Does everyone keep a separate record of their skin care routine?

Lately, my skin hasn't been what it used to be, so I've been trying to manage it in various ways, and I've been wondering about the importance of keeping a skin care journal. Some days my skin is fine, and other days it suddenly goes downhill. Looking back, I can't really understand why I didn't keep a skin care journal. Would it be helpful to keep a record of things like when I changed my cosmetics, had procedures, or changed my lifestyle? I'm also curious if those who consistently keep a skin care journal have found it helpful in identifying the cause of skin changes or skin problems. I think keeping a skin care journal in the form of photos or notes could be a good way to keep a record. I'd love to hear from you about how you utilize your skin care journal and your experiences.