Using secure passwords
I think it's fair to say we've all be warned about using secure passwords. The problem is, secure passwords are hard to remember. Who can memorize even one password that's something like 8-bV2A?3DWQZ? So, many opt for simple phrases, amalgamation of children's names, or appalling bad ones like "Password" or "123456". Don't laugh, they're VERY common passwords. Though it's from January this year, I doubt habits have changed much; this article lists the 25 most common (you can read, the 25 most easily hacked) passwords. If you use anything this basic, you're literally screaming from the rooftops, "Come hack me!".
I won't go over old ground, but I still recommend passwords of 12 characters minimum. They should have upper and lowercase, numbers, and special characters (the characters above the number keys). This tool will help you get safe, random passwords.
Still not keen on those random ones? Recent directives on password creation have focused less on complexity, and more on length. And passwords that are easier for users to remember. However, the emphasis is on length to offset the lack of complexity. Consider the liklihood of a hacker breaking the password above versus the phrase "Imetmywife,Jane,onadatingsite." While this phrase uses common English words, including punctuation, it is 29 characters long. And, latest research seems to indicate passwords needn't be replaced regularly - as long as they're good to begin with and you know they haven't been compromised.