To best prepare for the SAT, sign onto the College Board and sign up for, The Question of the Day. I suggest to my juniors to start the question of the day in September if they are planning to take the test in the Spring. In this way, the College Board will send you a real time SAT question every day. If you know the answer right away great if not, fear not! If you do not know the answer, print the question out and gather for oh about two weeks, all the questions you were not able to respond to. At the end of two weeks, sit with a teacher or tutor and review each question. This practice if done Monday through Friday, will give you 5 practice questions each week so that after 8 months (Sept. through April) you will gained information and, you will have become familiar with what an SAT question looks like and, how to pick it apart for quick responses.
Online, you can view a few websites that can help you as well such as:
The Ultimate Guide to SAT Grammer (book)
I think all of the above should really help you out!
Good luck -