It is important to note that Ph.D. programs in psychology are very competitive especially in the area of clinical psychology. Master's programs are somewhat less competitive.
Most graduate programs have many more applicants than there are openings in their programs.
Consequently, you must be well prepared and stand out from other applicants by going above and beyond in areas where you have strengths. It is difficult to rank order the admissions criteria listed here because graduate admissions committees typically look at applicant qualifications as a whole package. That is, strengths in some areas may compensate for weaknesses in other areas. However, quantitative measures such as your GPA and GRE scores are often reviewers first measure and first impression of you. Application essay, Personal Statement, or Statement of Intent.