If it’s not at least 8 characters long – it’s NOT a password.
If it doesn’t contain upper & lower case letters, numbers & special characters – it’s NOT a password.
If it’s been in use over 12 months – it’s NOT a password.
If you’ve shared it with anyone – it’s NOT a password.
If it doesn’t score better than 1,000,000 years at howsecureismypassword.net – it’s NOT a password.
If you borrowed it from somebody else  – it’s NOT a password.
If you ever wrote it down  – it’s NOT a password.

And if it’s NOT a password – DON’T use it as one!!