Sat and SAT II preparation

<p>Hey guys,I am starting my SAT preparation so I need a handful of advice because I really want top scores(at least I'll try :P).
I have one book up to now which I've started working on McGraw-Hills SAT 2009,now I want a couple of suggestions on what other books should I buy ..
I've decided I'll do Biology and Maths (i have on other subject to choose probably Italian or Chemistry) so I need a list of the books I'll need for these subjects...Is How to Prepare for the SAT II Biology E/M any good?Any books about the Math?
I am trying to get to Harvard(then would be Princeton etc) but King's College London is a second or third choice,does it require different preparation?
My current extra-curric activities are:
Am an European Youth parliament delegate(probably will represent my country next July)
Have been invited to take part in Modul-UN(will go)
Took TOEFL at age 13 and took 97 points(I think I was the youngest ever to take it)
Work in a drug rehabilitation center to help drug addicts
Worked as a designer
worked as a personal trainer(i am pretty good in biology and biochemistry)
Have an IQ of 150
I powerlift and bodybuild and have won some regional powerlifting competitions for my age(they are organized by gyms so there isnt any nation powerlifting team or smth)
Done a lot of Projects to represent my school
Am in the debate group
I have rejected the role of president of the class last year,probably will take it this year.(have been president of class for 3 years in class 6,7,8 then i resided :P)</p>

<p>What should I add where should i work more?
also I have a gpa of 9.7-9.8 out of 10 this year,I want a perfect 10 the next,but we will see,..I am 16 and currently waiting to enter the 11 grade.
Thanks in advance guys :D..</p>

<p>It’s not necessary to list all your EC’s unless you want us to “chance” you for certain colleges. There’s a whole separate “chances” forum for that. Anyway, for the SAT, most recommend the Official College Board blue book- since it’s made directly from the makers of the actual SAT that you will be taking. For Math II, I used the Princeton Review prep book and the Official College Board prep book for the maths. After doing those practice tests and scoring well on them, I got a 710 on Math I and 800 on Math II.</p>