Frequently Asked Questions:
APA maintains an FAQ (a list of frequently asked questions).
http://www.apastyle.org

Many people are at a loss on how to cite the Web or databases - check out:
Electronic Reference Formats Recommended by the American Psychological Association
http://www.apastyle.org/elecref.html

Many schools and departments maintain examples and style guides.
Check out these two:
http://www.docstyles.com/apacrib.htm
http://www.wisc.edu/writing/Handbook/DocAPAPrinciples.html