Decide where you want to go to school to pursue your education in athletic training. Find out what schools offer a bachelor's or master's degree in athletic training and which ones have good relations with athletic trainers and other sports organizations, so you can get a job more easily when you're out of school.
Complete your general education courses and any prerequisite classes you need to get into the athletic training program. Usually you will need to observe a licensed Athletic Trainer for a set number of hours to get a feel for the job, then be admitted to the program once that is completed.
Take the required courses and finish with grades that are high enough for the program's standards. Most will not let you pass a class with anything lower than a C, and most athletic training programs will only allow a certain number of credit hours with a C before putting you on academic probation or making you retake the course.
Complete the degree program from the chosen university and receive your diploma. Take the certification exam through the National Athletic Trainers' Association. Once certified, you can take a job as an athletic trainer.