On the SAT, easy questions have popular, obvious, intuitive answers; harder questions have unpopular, obscure, and unintuitive answers. This means that in guessing, particularly on harder questions, don’t go with your first hunch. Those answers that attract people’s first hunches are usually put in there specifically to divert your attention from the real, difficult, not-very-obvious answer. So if an answer to a hard question seems to “pop out at you” for no apparent reason, you’d better be very careful, and probably shouldn’t outright guess that answer at all!