Four month study plan to improve sat score

<p>This January, i took the sat for the first time and scored an 1820( 640 math, 580 cr, 600 writing, and 8 on the essay) </p>

<p>I'm going to take it again in June and was wondering what would be the best study plan for four months to improve my score by maybe 200-250 points(if possible)? I have the official sat guide first edition to practice from but is there any other books or sites that will help me? And what should I concentrate on most? Thanks</p>

<p>Direct Hits Volume 1 & 2.</p>