xkcd comic offers some helpful advice on creating memorable but still difficult to hack/guess passwords.
XKCD on Password Strength
“Through 20 years of effort, we’ve successfully trained everyone to use passwords that are hard for humans to remember, but easy for computers to guess.”
Take a lesson: a password of four random words is harder to guess but easier to remember than a one-word password containing some gibberish symbols substituting for letters.
Source: xkcd: Password Strength