Do you need more than what xiggi has outlined in the summary of his method?
Xiggi's SAT prep advice
The program in a nutshell:
1. Take 1-2 tests without time limit and with open books. Take your time to read the questions, answer them, and CHECK the answers, as you take the test. The idea is to make sure to understand all the terms. The score is far from relevant.
2. Take the following 2-3 tests without time limit but close the books. Now, you are on your own. After taking the test, check the answers and make sure to check ALL your answers, including the correct ones.
3. Take the next 2-3 tests, within the allotted time.
4. Take the last tests and try to shave a few minutes. Look for patterns, shortcuts. Soon enough, you'll recognize problems in a few seconds. However, make sure you READ all the questions. Trying to save 5 seconds in that part is NOT wise. Remember that you do NOT have to finish all the problems. As soon as you can determine the BEST answer with certainty, you are DONE. Managing your time wisely is the key to a great score. This comes from practice.
5. I would also recommend that you work one section at a time. Spend about one hour on each section. Marathon sessions will not be as productive as repeated shorter ones.