For passwords, do what I do and use a password vault. Something like LastPass, StickyPassword, or another similar software.

They store all of your passwords in an encrypted password vault that is unlocked by one master password. The encryption is similar to what banks and government websites use to protect your information. They will let you generate a random password for each account or app and store your username and password in the vault and easily copy/past everything into the login page when you need to log in.

I have premium StickyPassword myself. You can buy it for a one time fee of around $120 or purchase a monthly subscription. I get easy, secure access to my password across all of my devices which makes me life so much easier. I lucked out and got it at a deep discount for being a student but it would still be worth it to purchase at full price.

If nothing else, it beats remembering 30+ different passwords.