I need Tips and strategies to improve my verbal.

In writing section, questions from 15-27, I rarely make mistakes. I sometimes make 1 or 2 mistakes on vocab questions, questions from 1-5, depending on the difficulty and from 6-15 questions, reading questions, i do most of mistakes there. I get 24-25/27 in module 1 but 19-21/27 in module 2. How can i study and what to do so to guarantee myself at least 700 in R&W. Help me guysss. This March SAT is going to be a turning point in my life.