Is it possible to raise a bad SAT score to a high one in a short time span? HELP!!

<p>So I got a 148 on my PSAT. And I'm going into my senior year. I've wasted a lot of my summer and it's halfway through July. I really want to start studying hard for hours per day for the October test. So, is it possible to raise a 1500 score to a 2000+ in that range if I work hard? Motivational advice and personal stories are greatly appreciated. Nothing negative or mean though. Thanks.</p>