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.
Admissions directors are in charge of hiring and training staff, setting schedules and being up to date on the latest trends, practices and rules, making sure staff is given this information. They make sure that the mission and philosophy of their medical facility is understood and upheld by all of their staff.