On Goodreads my Want to Read list is for books I own but haven’t read yet. Books to purchase go into a handwritten notebook organized by genre and status (meaning whether I own it and want a better edition vs. I don’t own it at all). Like others, I’ll review my notebook occasionally and pare down ones I’m no longer interested in.

ETA that the notebook makes it more visceral and tangible to me. Otherwise I’ll get a massive list that never sees the light of day.