I just finished reading Malcolm Gladwell's "Blink", and it was one of the most compelling little reads I've had in awhile. Gladwell does a great job of breaking down the way we make "snap judgments" - and how they can be both better and worse than a considered opinion - depending on things like visual cues, the overall flow of information, and our pre-existing (and not necessarily conscious) prejudices. It's a book that will make you ponder the way you think and act.