my brain - i have two words i use as passwords - change them when they request changing. With caps letters numbers and other characters - !@#$%^&*()
Otherwise - just use the lost password reset route should you forget them.
have one password as a base, and then append the first letter of the site the password is for. That way you don't have to remember much, and if your password is leaked and stored to a database, it wont work on most other sites.