Critical Reading Help

<p>I'm taking my SAT on October 14th, but I'm having trouble with the critical reading passages. I'm okay with sentence completions becaz i worked on my vocab. But, for reading passages, I tried so many different strategies and none of them work. I'm especially weak in the global questions. I just dont know what to do. My scores for verbal right now are either in the low 600s or high 500s. Can some1 help me?</p>