The 1st Thursday of May (today) is #WorldPasswordDay encouraging secure password practices.
I highly recommend PasswordSafe https://pwsafe.org
It offers clients for many platforms. I keep my master copy of the encrypted database on my phone, and sync copies to laptop & tablet. Regular backups go to local NAS, cloud and a USB drive kept in the safe.
There are many tools to choose from, but the key is to find a vault that works for you. AND USE IT!