Don’t wait for it to become a throwback before you decide it was good.

Nostalgia is mostly a trick of timing. Things get labelled good years later, once you are looking back with everything softened, when at the time that same stretch felt boring and full of complaints. Nothing about the period changed. You finally gave it credit after it stopped being available.

Pick something happening right now that you suspect you will miss. The house, the team, the walk to school, the people currently around you. Say it out loud to somebody, or write one line about it, while it is still ordinary.