Read, Read, Read all the info on these forums! 
I have learned so much since I've been here (when I started in August my EX score was 453 and now it is up to 500). You can change your score in a short amount of time, but it is ALOT of work, and sometimes frustrating when the letters you've sent don't work the first time around.
I have learned so much since I've been here (when I started in August my EX score was 453 and now it is up to 500). You can change your score in a short amount of time, but it is ALOT of work, and sometimes frustrating when the letters you've sent don't work the first time around.But it's worth the effort because it will only help you in the long run! Good luck and I'm sure in a few months you will have had some successes to tell us about!