When I was younger I used to read only the last sentence of the book, and then read the entire thing through. It usually kept me guessing as to what it was referring to, which characters that sentence was about. More often it than not it's something cryptic which doesn't spoil much without the earlier paragraph.

My least (and simultaneously most) favorite one was “He put on a little light music instead.” I think that's the last book I read in that way.