Possibly the more time consuming aspect of a cyber security job is keeping aware of the threat landscape. This is by no means an exhaustive list, but links I often keep in eye on.
http://technet.microsoft.com/en-us/security
http://www.cert.org
http://www.owasp.org/index.php/Category:How_To
http://www.us-cert.gov
http://www.nist.gov/computer-security-portal.cfm
