Think beyond your years in high school. Are you going to college?  How many years of education do you need to pursue your career? List all the classes you want to take. Sort them into four years (some classes are available to specific grade levels). Whether it takes hours, days, or weeks, think about all the possibilities and have two majors and careers in mind. Having a backup plan gives you more opportunities to explore your capabilities. The career you have in mind right now could be different from what you actually pursue four years later.