Class rank is an important piece of the admissions puzzle. The higher your class rank, the greater number of colleges you'll have to choose from. Find out from your guidance counselor your class rank. The PSAT test is given prior to your senior year. Most colleges require the SAT or ACT test score, although, there are some colleges who have begun to drop their test score requirement all together.
Different colleges require different test scores.
It is highly recommend you take the SAT and ACT exams in the winter or spring of your junior year. Then re-take them in the fall of your senior year. Many students improve their scores the second and third time around. Also, do an athletic assessment. Your coach is usually the best person to help you assess your athletic abilities.