Below are 6 recommendations for protection:

PC Magazine — Six Ways to Protect Yourself from Duqu
http://securitywatch.pcmag.com/malware/290204-six-ways-to-protect-yourself-from-duqu
http://www.darkreading.com/advanced-threats/167901091/security/attacks-breaches/231902310/five-things-to-do-to-defend-against-duqu.html?itc=edit_stub

QUOTE: Six Ways to Protect Yourself from Duqu

1. Microsoft Hotfix available
2. AntiVirus updates
3. Avoid unknown documents
4. Monitor for infected machines on network
5. Watch Port 443 traffic that’s unencrypted
6. Keep an eye out for ~DQ files

Microsoft Hotfix available
http://www.pcmag.com/article2/0,2817,2395861,00.asp