The problem is that simple passwords are easy to break via so-called "dictionary searches". The horse manure is supposed to address that. But the problem is that "password" and "password1" and "passw0rd" are in the bad guy dictionary. And all of those are short, and thus easier to break than longer passwords.

The most secure approach requires two (or more) forms of authentication, like a password and a fingerprint, or a password and a code sent to your cell phone.

But getting back to how you generate passwords: you should use a better scheme that's easier to memorize. Here's a well explained venerable approach in cartoon form.