This is one of the best tools, government paid for and operated. What Is the ADR?

The Adjudicative Desk Reference (ADR) provides convenient access to the following information:

• Adjudicative Guidelines: This is the official U.S. Government policy that guides decisions on an individual’s eligibility for access to classified information, that is, eligibility for a security clearance.
• Supplemental Information to the Adjudicative Guidelines: This is a large compendium of background information and reference materials on the diverse human behaviors covered by the 13 issue areas of adjudicative concern. As noted below, Supplemental Information is not U.S. Government policy. It is a job aid to assist security personnel in making informed judgments to implement policy.
• Policy Documents: Executive Orders 12968 and 10450 and Director of Central Intelligence Directive 1/14 are the principal national-level policy documents that guide the U.S. Government personnel security program.

  The Personnel Security Committee of the U.S. Government Security Policy Board considers this program ARD a valuable tool and encourages its use by all U.S. Government agencies that make personnel security decisions. The program was developed by the Security Research Center of the Defense Security Service. It has been reviewed by DoD Public Affairs and approved for public release. This is version 99.1-html dated January 1999.

Some of these articles are posted at http://lastpostpublishing.com/SC_Articles.aspx and others including my most recent article on the “New Federal Investigative Standards” are at posted at http://www.clearancejobs.com/index.php?action=candidates.  There is also a very active security clearance blog (actually a forum) at http://www.clearancejobsblog.com/ where a few other security clearance investigators and I answer questions about security clearance processing.