On Wednesday, 10 February 2016 18:03:06 UTC, wrote:
Choose your favourite song or poem and a generating rule and you can
have very memorable passwords that are all but unguessable.
What do you do with sites that insist on a password change every month
or so?

use mhallifwwasjan and mhallifwwasfeb, etc.

Most only check for 'identical' password reuse and not 'similar'.

There's a virtual screwfix voucher for anyone who can guess the origin of the password (which I haven't used on any real system).

Owain