Request your transcript from your high school administrative office and tell the guidance counselor/administrator to which college(s) it should be sent. Check the transcript first to make sure the classes and grades are accurate and complete.
Build up your transcript while you're still in high school. Good grades are important, but admissions officers are also looking to see that you opted for a challenging curriculum.
Outline your experience in your college profile in a way that shows your best attributes. Include clubs and committees, activities you participated in and rewards and recognitions you received, especially if they pertain to your educational goals.
Explain your interests in your profile.
Give examples of your skills in your profile. Include work experience and any skills that pertain to your area of educational interest.