Research

I can not tell you how important this stage is.  It is the hardest because it takes time and it isn't always fun.
Find out about the strengths and weaknesses of your personality at www.keirsey.com.  Then you can find careers that best fit that personality.  As you begin to research a college you would like- you have several questions to ask yourself.   Do you want to be in a large city? small city? rural area? Do you want a school with a huge athletic team to support? What type of organizations do you want on the campus? How far do you want to be from home? Several options to choose from for sure in the US.  There are over 4200 colleges universities--there are several that will be a great fit for you.  As you are traveling, make efforts to drive on college campuses.  This will begin your process for what you desire in a school.  You can start making official visits by your sophomore year.  Time is fleeting so take the time to invest in your future.  Who are you and who will  you be.  Choose wisely.