Use a passphrase. Easy for a human to remember, hard for a machine to crack.
The difference is a passphrase is a bunch of random words stringed together so you get a longer passcode, versus a shorter string of random characters, which is a password.
Obviously the best is long passwords, but that's only if you have a password manager.
Ah yes my workplace is like this due to the data we work with. I get to use a KeePaas though!