The key is to keep trying. You won't win every scholarship, no matter how good you are. I'm currently a senior in high school, you just need to keep applying and you'll get it! Some of the best scholarships are local ones!
A great way to find scholarships that cater to your specific "talents" is to visit scholarshipexperts.com, scholarships.com, and even fastweb.com. They are all great websites to help people find and apply for scholarships