Threats caused by employees

These are all possible threats that an employee could cause, how could an organisation prevent these or minimise the chances of them happening?

1. Telling outsiders their password, or other security info
2. Taking sensitive information away on paper, usb pen, ipod, via email, fax, or mobile phone.
3. Clicking on an unsafe link in an email.
4. Forgetting to lock their screen when away from the computer.
5. Using an insecure password.
6. Bringing in an virus infected usb pen.
7. Losing their company laptop.
8. Can you think of any more?