What sites are great for scholarships?

the best one is probably FastWeb Good Luck!

Princetonreview.com has some info on scholarships too, I think

Fastweb is good. I will tell you that highly competitive academic schools are not as forthcoming with scholarship money; you have to have a really strong financial need and circumstances to make you a unique addition to their student body. If you have your heart set on it and meet the requirements, you could take out loans, but that would mean you could get out of undergrad $160,000 in debt, and still facing grad school. There are tons of great schools that do much better with awarding scholarships that have Ivy League educated professors.

Look for scholarships on the local level. Do your parent’s employers offer scholarships? Any clubs? Are you a scout? Rotary clubs, etc. have competitions. Is there a summer program for academically gifted high school students? If your guidance counselor is on the ball, she/he should be working to get you placed with scholarships. Make a visit to that office, and see how they can help you. You’re right to start in your junior year; some deadlines are already passed.

You may find this book helpful.