This morning, NPR's Morning Edition featured an interview with Marc Boroditsky, CEO of Passlogix and a computer security expert.

From the article:

Tips for Safer Passwords

• Don't use passwords that are based on personal information that can be easily accessed or guessed.
• Don't use words that can be found in any dictionary of any language.
• Develop a technique for remembering complex passwords.
• Use both lowercase and capital letters.
• Use a combination of letters, numbers, and special characters.
• Use different passwords on different systems.
• Don't share passwords with others.
• Change passwords regularly.
• Store passwords in a safe place.
• Don't leave passwords where others can find them.

This article is worth a listen, particularly for the ideas regarding password construction. Check it out!