Using a complex, virtually impossible to guess type password is very important these days. Hackers have password stealing software that could help them gain access to your computers valuable data. Any security measures you take can be undermined by a simple to steal password.
Never setup an account without creating a good password for it. I recommend using a password that is 15 or more characters (whenever possible). A password should never be less than 5 characters.

The hardest to steal passwords incorporate a mixture of character classes such as uppercase, lowercase, numbers, and symbols. Stay clear of using passwords that are regular dictionary words or names. Password stealing software will sniff those out extremely fast.

Also, stay away from using keyboard patterns such as "ZXCVB" or "123654". A very effective way to remember a long password is by passphrasing. A passphrase is a collection of 'words' used for access control. An example of a passphrase would be "Ihatecheapbeer!"

It is important to use different passwords for each of your important accounts. If one of your passwords is compromised, then the others accounts are not easily accessed. This can be a bit of an inconvenience, but with the use of some creative passphrasing, it doesn't have to be that hard.

Lastly, be sure to change your password often. This is especially important if your computer is accessed by other individuals. Keep to a good password regimen and your personal information should remain safe and secure