You can add Malwarebytes Anti-Malware Free to your on-demand scanners. Always check the files you download from the Internet or files run from an external medium. You can use online resources such as WOT (mywot.com) and VirusTotal.com
On demand scanner(s) such as MBAM Free and or Hitman Pro.
Some type of backup.
Chrome extensions such as ABD +,Ghostery,Https Everywhere.
Thanks for sharing