In the article linked below, an Internet security expert explains how he can hack your passwords:
Believe everything in this article! You are vulnerable! Your first line of defense is using strong passwords on ALL of your accounts. Your e-mail account is especially important since it can be used to reset the passwords on many of your other accounts; including online banking! We strongly recommend adopting a password manager and using it to help generate and remember strong passwords. We also recommend that you periodically change passwords to make life even harder for the hackers.
See our Check List for additional information that can help you improve your digital security.