Sci-Fry, it's panic's goal to engage people in conversation and then insult them... so, best thing to do: Not talk.
Btw, you have great English skills for an international student (unless English was your first language? What kind of international student are you exactly?)
@CC - Godfatherbob's advice hit the nail. I immediately started studying for the SAT after my hopeless 159 on the PSAT 2006, and I've brought that up to a 2000+ on my SAT(s) 2008. You need to make a timetable/schedule for yourself (a realistic one) and FOLLOW it. That's what I did... (I started with the CollegeBoard Book). Read 1 chapter of Reading, 1/2 Math rules, 1 Writing rule everday. Take 1 section of CR, Math, and W everday. (This would be about 2 hours work...). And learn 10 new words everyday. By 'learn' I just don't mean 'cram'... I mean KNOW the words. After you learn them, USE them in sentences, in English class, etc. If it helps, you can also learn root words ... these really help with words you don't know on the SAT. (This takes about 15/20 mins).
Even if you don't want to do this from 3-10 blah... wake up everyday till midnight for that 2300+ goal. I doubt teenagers go to sleep at 10... that's a bunch of bollox. I can never go to sleep at 10.
Plus I'm sure your parents won't argue with you if you told them WHY you were staying awake. Anyway, studying late at night is kind of harder than studying in the evening. So, suit yourself.
So, basically you have to set aside at least 2.5 hours for SAT study. EVERYDAY.
If you want to do more than this, by all means... Go for it!
After about 1-2 months of studying, you should start taking practice tests once a week (on Saturday/Friday)... and go over it on Sunday.
If you don't understand some of the grammar rules/passages/vocab/math rules (and it's okay to not understand), you can always come on CC or you can go ask your teachers. Never hesitate to ask your Math Teacher/English teacher for SAT stuff. They know their students are going through that whole phase right now and they'd LOVE to help you. Trust me, my Math Teacher stayed after a whole 30 minutes to do SAT Math Practice with me.
Good luck! And keep us updated.