Easier said than done
Being able to create strong passwords is one thing. Being able to recall them is another. And, being able to recall the relations between the accounts and the corresponding passwords is yet another.
At the root of the password headache is the cognitive phenomena called “interference of memory”, by which we cannot firmly remember more than 5 text passwords on average. What worries us is not the password, but the textual password. The textual memory is only a small part of what we remember. We could think of making use of the larger part of our memory that is less subject to interference of memory. More attention could be paid to the efforts of expanding the password system to include images, particularly KNOWN images, as well as conventional texts.
Incidentally, biometrics are dependent on passwords registered in case of false rejection in the cyber space. So are multi-factor authentications and ID federations like password-managers and single-sign-on services. And, in a world with passwords killed dead , we have no safe sleep. Passwords will stay with us for long.