Also, make use of CR guides written by others on this forum:
http://talk.collegeconfidential.com/sat-preparation/1024138-how-i-got-an-800-on-the-sat-critical-reading-a-story-and-guide.html
http://talk.collegeconfidential.com/sat-preparation/750399-how-to-attack-the-sat-critical-reading-section-effectively.html
http://talk.collegeconfidential.com/sat-preparation/1637676-how-i-raised-my-sat-score-by-790-points-my-story-p1.html
http://talk.collegeconfidential.com/sat-act-tests-test-preparation/1449360-sat-critical-reading-semi-guide.html