Best Way To Improve My Score?

<p>I'm currently a Junior in High School and will be taking the PSAT soon in October, and will take the SAT later on in the school year. I know there is not much I can do to improve my PSAT score (expecting a 150-160 based on the one taken my Sophomore year), but I would like to get the highest score possible for me on the SAT. I have already decided to get the "Blue Book" this weekend, but I know that the main purpose for the book is the practice exams available. I wanted to accompany the "Blue Book" with another book or books to help me review the concepts prior to taking the exams within the book. Based on the fact that I'm currently at about 50s all across the board, which books do you guys recommend I invest in to improve the most? (I'm okay with spending some money as long as I get my moneys worth) Aside from this option though, I've also read that having simply the "Blue Book" and using Khan Academy as a source can be enough to improve ones SAT score. Overall, what are my best options? If you guys recommend I accompany the BB with other books, which books do you suggest? Any advice is appreciated, thanks. </p>

<p>Practice.</p>

<p>I would add both books from Erica and SAT official online course for just practice tests.</p>