It's easy to get carried away with all the extra-curricular activities available on campus, but don't forget that you also have to study. Review your syllabi or ask your instructor to find out the deadlines for assignments and exams in each of your courses then use an online (or paper) calendar or planner to keep track of those deadlines. Be sure to schedule in time to study, so that you don't wait until the last minute - a practice that doesn't work so well in college.