They're very helpful considering I'm in Finals right now.

General high school guide: http://pathaspire.com

From this website, you can read articles/advice/tips on:
- Standardized Testing (including SAT, AP, SAT II): http://pathaspire.com/standardized/
- Extracurriculars: http://pathaspire.com/extracurric/
- Scholarships/Aid: http://pathaspire.com/scholarships/
- "Conquering Time" (how to manage your time efficiently, how to study efficiently and effectively): http://pathaspire.com/plan/scheduling/
- College info (best departments, reviews ... etc): http://pathaspire.com/college/
- High School tips/articles: http://pathaspire.com/highschool/
- College applications: http://pathaspire.com/applications/
- Self-Improvement (health, intellectual): http://pathaspire.com/improvement/

I actually don't know if this belongs here... but I found this a plethora of info/advice needed for high school/college.. and there are many study tips in the standardized testing and managing time articles