I consider myself to be very organized and sometimes keep track of more than I likely need to such as lists of gifts given and received for birthdays and holidays, lists of adult education classes taken, and lists of road races run. I have friends that also keep track of things such as miles driven between gasoline fill ups, so I know this habit is one many people have. The variable is what each person keeps track of.
It is so rare that I go back and look at all these records, but occasionally I do and am happy I have the notes. As an example two weeks ago I started running 5k road races again after a 10 year absence. I was glad I could refer back to my times and see the progress I made in the past that I hope to repeat in the future.
It is always helpful to have notebooks to write down the things you keep track of in or to doodle during the day.