I’ve been into anime and manga for years, mostly shonen like One Piece and seinen like Berserk. I keep a digital list on my sites.google profile sites.google profile so I can remember which volumes I own and which arcs I’ve rewatched. I also follow seasonal shows through MyAnimeList. The downside is updating it regularly—I get lazy after a binge. But it beats losing track of my physical shelf. If you’re a collector, a simple online list helps a ton.