Think about your personality, likes, dislikes, values, talents, and goals. Consider the courses you've done well in previously and enjoyed. Take a career interest inventory to clarify your personality type and preferred work environments.
Be sure you know this information before you decide on your major:
There are many excellent websites for researching careers. Start with http://online.onetcenter.org.
The Career Exploration Room (C138) and libraries have books and resources with career and college major information. Look in the college catalog and read descriptions of the courses in different departments to see if they interest you.