The only thing I would change would be for me to have done more volunteer work around the community. Also, aside from that my advice is:
1. Keep your GPA up. Dont try your junior or senior year to finally start applying yourself.
2. Join clubs as a freshman. (Again, dont wait until the last minute and cram clubs into your senior year)
3. Begin your college/scholarship search as soon as possible.
4. Take the SAT's seriously. Your first time shouldnt just be a "practice round."