18 most dangerous things users do online

1. Clicking on email attachments from unknown senders
2. Installing unauthorized applications
3. Turning off or disabling automated security tools
4. Opening HTML or plain-text messages from unknown senders
5. Surfing gambling, porn, or other legally-risky Websites
6. Giving out passwords, tokens, or smart cards
7. Page 8: Random surfing of unknown, untrusted Websites
8. Attaching to an unknown, untrustworthy WiFi network
9. Filling out Web scripts, forms, or registration pages
10. Participating in chat rooms or social networking sites

11. Double-clicking to open a file, rather than specifying "open with" and choosing the application.

12. Not running the appropriate defensive softwares for your activities (eg: firewall, anti-malware, anti-execution, disk-protection, sandbox, virtual-machine), and configuring them for your usage.

13. Remaining connected to a network when you aren't using it, especially if it provides internet access.

14. Not routinely restoring one's OS from a backup to flush out malware that has gone unnoticed.

15. Not installing updates for operating systems and software.

16. Browsing without a script blocker.

17. Browsing with plugins on auotmatic.

18. Browsing with plugins that are not up to date.

If you avoid these things, you would be safe on the internet.