How to bump Critical Reading score to 600+

<p>So my first SAT was okay for not studying (670 M 620 W 520 CR). I know my math and writing can improve (Apparently the curves for this test was HARSH). However, idk if I can improve CR. It's by far my lowest score.... I've been studying since July, but I'm afraid my studying will be for nothing.. (I only improved 30 points from my sophomore PSAT to Junior SAT). I was just wondering if you had simple tips that would help me? Thanks!</p>