Password and Personal Safety
It is important to keep your passwords safe. Even with strong passwords and good password managers, your password could be discovered. So here is some more advice:
First, we have an article with guidelines for password safety. Despite being intended for businesses, these guidelines can help your personal security as well.
Many people make mistakes online, and people with malicious intentions can end up with your personal information or passwords. Don't follow in these users' footsteps.
There are multiple free tests available online. Try at least a few to see how well you are secured against different threats.
On the subject of passwords, the type of malware we are concerned with now is spyware, especially keyloggers. Even if a computer is running smoothly, a keylogger can still be installed, collecting your activity and sending it to a remote observer. Your information might then be sold or used immediately.
For most people, this is undesirable. Bright Hub offers many articles on protection, detection, and removal of malware, and two of these articles dealing specifically with spyware are offered here.