The Internet has a tremendous amount of information regarding psychology. I've included some sites that have multiple psychology links.
Clinical Psychology Resources: Great website with multiple links to psychology professional organizations and psychology topics.
Psychwatch: An online resource for professionals in Psychology and Psychiatry. Areas of interest are separated by discipline. Includes the option to subscribe to a psychology newsletter.
Psychological Science: Long list of psychology links.
Psychology Teaching Resources: Resources for those teaching psychology and multiple levels. Links range from statistical calculators to perceptual exercises. Maintained by the Association of Psychology Science.
Quack Watch: I had to include this site. Great information about dubious medical, psychological and other procedures and conditions.
HighWire: Social sciences search engine for professional articles. Great for searching professional databases.
Dr. Michael Fenichel: Dr. Fenichel has gathered a number of psychology links that are worth reviewing.
Psych Library Princeton University sponsers this Internet Resource Site for psychology and related disciplines. Hundreds of links.