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If your time is at a premium, consider using customizable materials from such sources as the Multi-State Information Sharing and Analysis Center (MS-ISAC). Their "Cyber Security Tips Newsletter" is produced monthly and can be readily adapted for local use.
SANS's OUCH! security awareness newsletters are another good resource. They These monthly newsletters are also free and available for reprinting in whole or in part as neededor sharing.
RSS feeds can provide dynamically refreshed content. One example is the MS-ISAC "Cyber Security Tips Newsletter" mentioned above. It is one of several RSS sources that Rutgers aggregates and includes on their security site.
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