I used to keep a Document on my computer for years. Then the computer crashed one day and I lost all my entire anime and cartoon history. I also used to list them on how much I liked them or if I didn't like them and the harder to find ones I would put which website I found them on (this was years ago back before anime was mainstream now)
Since that crash (which was YEARS worth of shows) I've slowly stopped watching anime every season and honestly only watch 1-3 shows a year now. I've also stopped tracking my anime history since about 2010 or so.
The thing that really sucks is that I have been having this dream and daydream about this anime opening for the past week. I know I saw the anime but can't figure out what it was called and it is on the tip of my brain. I'd really like to hear the song again. If I had my list I could narrow it down a bit more since my mind would go "Eureka!" if I could read the title in front of me.