Think your password is secure? Don’t assume it is. Here a nifty new site that will let you check and see: http://howsecureismypassword.net.
If your password would only take a short time (less than a few hours) to crack, try adding one more character and see what a dramatic difference it makes. Also try adding a symbol or two (!#$%^&*), or making one or more letters UPPER CASE.
Of course there are some factors that website can’t account for. For example, if your e-mail address was email@example.com and you used your username (“johnsmith”) as your password, that would be simple to guess. Also, if your birthday was January 1, 1970, and you used john1170 as your password, someone that knows you might be able to figure that out after only a few guesses. Overall though, it’s a very interesting and useful site.