The sites listed below may be of interest (no endorsement is implied by the listing):

American Psychological Association
Information about mental health and professional psychology

Florida Psychological Association

National Academy of Neuropsychology
Information of neuropsychology, educational materials, continuing education, e-mail directory of members

Mental Health Net

International Neuropsychological Society
International organization of neuropsychologists with conferences scheduled to occur in various countries.

National Library of Medicine
Online searches of journal articles in a wide range of journals in health, mental health, and neurosciences.