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Starting in high school, and continuing into your undergraduate years in college, you should take classes that teach you the analytical and critical thinking skills you will need to be a scientist. This is a must to get a leg up later in life.  You'll need to be well-specialized in mathematics. Scientists in the physical sciences use a great deal of mathematics, particularly algebra, calculus and analytical geometry, while those in the biological sciences use math less often. All scientists need a working knowledge of statistics, too.  Consider going to science camp during high school. You'll do more intensive projects than you do in your regular science classes in school. While you will specialize in a particular discipline later, you'll need to take basic courses in biology, chemistry and physics to ground you in the basics of each science, as well as the scientific method of observing, making hypotheses and experimenting. You can also select elective courses based on areas of interest or to discover new areas of interest to help you define your specialty. In a year or two, you can commit to a more specific branch of science. Skills in 1 or 2 foreign languages may be helpful as well. This allows you to read older scientific papers that haven't been translated into English. Additionally, being multilingual will enable you to collaborate with other scientists from across the world, as well as help you pursue research opportunities in other countries. The most helpful languages to learn include French, German and Russian. After you’ve gotten your feet wet and you’re familiar with the directions this career could take you, declare a major in a more specific branch of science. Planetary? Medical? Psychological? Geneticist? Agricultural? If you'd like or if your college's lack of options necessitates it, you can wait to declare something more specific later (aka grad school). A general major like chemistry is fine, too. It's best to start making connections and doing work as soon as possible. Contact one of your...