SAT critical reading help please!

<p>Hey everyone, hope your thanksgiving was great lol
I am new to this site and nice to meet you all.
Well, I am a junior/ got my November score recently.
Last year, I took PSAT without any prep, and I got 55 for CR.
Now, I got my Nov score of 640 for CR.
I really want to get it around 700 for January.
English is my secondary language, and I have heard that it's very difficult to raise my grade afterwards
(since I have already increased due to preparation over the summer). CR is extremely hard for me
(esp long boring reading passages). How did you guys raise your grade from around 640 to 700ish.
Thank you in advance for helping me out here!!
Overall, I want to raise about 100 points til Janaury. Thank you!!</p>