Heard several tech people say they "closed their Linked-In accounts" after passwords were reported stolen--typical comment--"I never used or needed my Linked-In account anyway." But if you have an account at Linked-In or elsewhere requiring secure passwords, I pass along the following:
Use separate and unique passwords for each site
Use non alpha characters such as ?!$% in the password
Use Uncommon Patterns
Do Not Use Biographical Details
Use Longer Passwords