Study the basic components of human and animal behavior. Write essays on what you've learned and take multiple choice exams on the subject. This will give you the building blocks you will need to earn a bachelor of science or other undergraduate degree.
Apply what you've learned in textbooks and in class when you do research and interpret statistical evidence. You may conduct studies on your own or in a group and write reports on your findings.
Improve your critical thinking and math skills. Statistics play an important part in psychological reports and evaluations and are necessary if you decide to focus on the research end of psychology.
Join a psychology club or organization. By bonding with other psych students, you will be able to learn more about your major in a relaxed way without the pressures of tests or classroom study.
Learn all you can about internship and part-time work opportunities. You may be able to assist one of your psych professors, or help a psychologist or counselor with paperwork or research.
Continue on to a master's program in psychology or secure a job straight out of school with your undergraduate degree. However, most psychology professionals do obtain a graduate degree.