In these of unleaded fuel, you may use spark plugs until the electrode erodes away. Every-so-often, check the center electrode for a sharp edge. As slowly rounds off, file it sharp.
Admissions officers look first at test scores, the rigor of the courses you take, and your grades in those courses. After that, they are interested in a student's extracurricular activities -- in other words, how you spend your time outside of classes.
What you choose to do with your free time speaks volumes about what you value in life. [ Make extracurricular activities pay off with college scholarships.]. College applications ask you to share a story about yourself and the kind of person you are. Your extracurriculars can demonstrate the truth of your narrative.