I tried reading Gone Girl a while ago and I gave up before anything interesting happened, because I just did not care about these people's marital troubles. Maybe things do get interesting later on, but the characters were not compelling enough for me to continue reading

I recently read Daisy Darker and I'd have to say that one because I felt like the twist was done so poorly. The fact that well...if you read it you know...., was very heavily hinted at since the start of the book makes it pretty predictable, but there were a few other very tiny things I noticed that would have directly contradicted this twist if I read it correctly.

(Also I read The Couple Next Door a few months ago and honestly barely remember the ending. Or anything else about the book.)

I'm not a huge nonfiction reader, but one thing I do with my school textbooks is to get a bunch of sticky notes (the small, thin kind) and whenever I see a sentence or paragraph that's important, I put one in that spot, then go back later and take some notes.