Here is some general advice for undergraduates who are thinking of applying to a graduate school.
Standardized Tests
Advice for taking the GREs.
Letters of Recommendation
Seven hints concerning letters of recommendation.
Personal Statement
Graduate applications in psychology often require a personal statement. Describe your background, and be sure to include any relevant research experience. Explain your motivation for pursuing graduate study in psychology, and try to convey something of your enthusiasm, and your drive to succeed in a psychology career. As far as you can, be specific about your plans. Many schools do what BC does: they admit students to work with a specific faculty member. You want to show these schools that you are thoughtful about your plans. So do your homework: Read what you can about the professors and their research. Then you can say which professor you hope to work under, and on what sort of project. It is always better, for you and the schools you apply to, if there is a good fit. Your personal statement is a place to make this clear.
Some Words of Advice
Suggestions for BC undergraduate students considering a career in professional psychology.