Some psychology programs require the GRE subject test as well. This is a paper-based exam that covers a broad range of topics in psychology. A variety of preparatory materials and courses are available. You must research programs in your area of interest. Your academic advisor can offer guidance.
Faculty members are also an excellent source of information.
Your letters of recommendation should be written by individuals who are familiar with your competencies and potential for success at the graduate level. Preferably, most or all of your letters will be provided by faculty. Letters from employers, volunteer supervisors, and campus administrators are appropriate only if your experience with them is directly related to your educational goals. Tuition and fees vary widely among graduate programs. In general, it is better for you to go to graduate school somewhere other than your undergraduate institution, especially if you intend to remain in the same academic field.