Use a Password Manager
Security is crucial, we are all using more and more digital tools that systematically need ids, passwords, codes, sentences, etc. the number is increasing and using the same passwords may create a security failure.
So with so many different login credentials to remember, a password manager can help you keep them all organized and secure.
A good choice may be Roboform.
On their website they offer to try the company or personal package.
or 1password which allows you to have separate accounts for different people, and centralizes everything.