Can I still improve before the June 6th SAT?

Hi guys, I am not taking the June 6th SAT and I plan to take it one more time during October. I got 1700 from February’s SAT (690M; 500 CR; 510W). I just took a practice test from the blue book and got a 1740 (740 M : 500 CR; 510W). What can I do to improve my CR and W scores? I currently have the Barrons SAT writing book, the blue book and Dr.Chung’s SAT Math. I know that CR can’t be improved in a short period of time, so I am willing to face the fact that the highest score I can get is probably a 1950 (800M ; 550CR; 600W) .

As you said there is no easy way to increase your CR, but you can see the patterns of the questions. Do you get most of the vocab wrong?
Writing is the easiest to increase just learn the rules.