I've got a google sheet with 5/6 different tabs on it, a reading log where I can update when I started/finished, whether it's a series or not, author, number of pages, genre/sub genre, physical/eBook, where I got it (library/KU/Purchases etc.) and rating, then a tab for my TBR, a series tracker, then a couple of tabs with charts showing different things. I love data and messing around with excel/sheets and it's good practise for formula's etc