I’ve heard several people lately say, “I haven’t changed my password since I started working here”. That’s not a good idea.
I ran across this article at Microsoft about passwords that might be helpful.
P.S. I just noticed the article was written by Kim Komando. She has a weekly radio show on WGOW 1150 at 10am that is certainly worth listening to. You can check her out at her website also: http://www.komando.com