Passwords are a secret combination of letters, numbers, and symbols known only to users to protect data and information from unauthorized users. Think of a password as a key to unlock personal and secure information. Passwords should not be simple so that someone can guess it. Never use “PASSWORD” as a password. 

Things to consider when creating a good password:

More characters are better.
Don’t use your initials.
Mix alpha (lower case and capital), numeric and symbol characters)
If you use words, intentionally misspell them.
Don’t stick password on your computer.
Don’t share passwords
Try to end up with something that you can remember: m84!liPhe$