For those that use Lonelog and play analogue, how do you keep track of your tags?

For instance your npc and location tags. Do you have a separate book you log them in and keep track? Are there other types of tags you've come up with that you keep track of that are important for long term play?

I'm probably overthinking this, but I'm asking because what if 500 sessions in, an NPC that was mentioned around session 200 becomes important again, but you forgot who they are. Or, you haven't played in a month or two and come back and don't remember. Do you have notes you used to keep track of or do you just flip through the book?