Close reading is an important skill for succeeding on the Critical Reading sections of the SAT 

To do a close reading, you choose a specific passage and analyze it in fine detail, as if with a magnifying glass. You then comment on points of style and on your reactions as a reader. Close reading is important because it is the building block for larger analysis. Your thoughts evolve not from someone else's truth about the reading, but from your own observations. The more closely you can observe, the more original and exact your ideas will be. To begin your close reading, ask yourself several specific questions about the passage. The following questions are not a formula, but a starting point for your own thoughts. When you arrive at some answers, you are ready to organize and write. You should organize your close reading like any other kind of essay, paragraph by paragraph, but you can arrange it any way you like.