Improving CR Score??

<p>I'm taking the SAT this Saturday, and plan to retake it either in June or October. I am overall content with my Math and Writing scores (usually 800 M 750 W) on practice tests, but I really struggle on CR. On practice tests, I usually get in the mid-600s, never reaching the 700 mark.
I really want to improve this score, but I am pretty much locked in place-- it has not gotten any better in the past 3 months. I usually don't get to the last few questions, so time is mostly an issue. I also feel like I am just overall not comprehending the passages? I usually narrow the answer choices down to two, and just seem to pick the wrong one.
Does anyone have any tips? Especially those who got a +100 in their CR score on their second try?</p>