To keep track of authors and series I follow, over many years. To collect quick notes. Both for myself and ready for recommendations to others. To avoid trying

To keep track of authors and series I follow, over many years. To collect quick notes. Both for myself and ready for recommendations to others. To avoid trying again authors I dismissed ages ago (but whose book covers and blurbs still tempt me.) To keep several lists/queues to things to read (theme-based lists most of them). A few years ago I added date marks for when I read or re-read each item. I general these lists have made my reading more systematic and I can now always, but always instantly pick something that I wanted to read AND is on the shelf at the library.