SAT Critical Reading burden

<p>Ok so I'm a senior this year taking the SAT's. My scores are pretty low and my critical reading score is the lowest out of all. My goal is a 600 and I'm freaking out because I can't do vocab. The vocab is really difficult for me. How can I achieve a 600 on critical reading, any tips or helpful advice? The others I'm working on and all but critical reading is becoming a real burden. </p>