These days when I read it’s for education as well as entertainment. When I find a particularly pleasing sentence I mark it with a book dart. Later I go back and add the passages to a file if I still find them striking.
The book darts are gentle on the pages and don’t leave any marks, though you do need to be somewhat careful.
I purchased the tin of 125 in mixed metals, thinking I would give some to the members of my book club, but I love them so much it remains to be seen whether anyone else will actually get any! I find them immensely satisfying – the reading equivalent of writing with your favorite pen.