In 2016, the SAT changed drastically from the old SAT. In terms of content, no other SAT changes in the past few decades have been this dramatic. If you're familiar with the old SAT, here's what you must know to do well on the 2016 version of the SAT.
Update: The SAT is now fully digital. As such, much of the information in this article is no longer relevant. You can learn more aboutthe digital SAT changes here.