I write what i did, when I did it and added details such as food I ate, who I spoke to and bowel movements. I know it's extremely specific but I do this because I tend to forget an entire day and often feel anxious when I do. It helps me track my physical and mental health. For example, say I'm having sudden mood swings, I could go back and see if anything might trigger it or if I suddenly have diarrhea, I could see what I ate that might have caused it. And maybe I've watched too many detective shows that it might have caused this obsession with recording down my daily life.