Instead of relying on password managers or even an online note, find another option or way to keep your passwords or anything that is a credential to your accounts.
Personally, I use a password manager. It's convenient not having to remember passwords or use weak ones I can actually recall. But I know everyone has their own system and not all are created equal from a security standpoint. I'm curious what your preferred method is and any password wisdom you'd share! How do you balance security and convenience when it comes to managing credentials?
If we only have a few passwords then we won't need a password manager but if we have hundreds of passwords to remember, then I don't believe anyone would not use any password manager. That's really hard to believe, and what's more, not every password manager is as vulnerable to hacking and as insecure as Lastpass. As some people have suggested like protonpass, bitwarden, KeepassXC...all are safe and worth using. But it's also important to note that extremely important things like seed phrases should absolutely not be stored there, avoid storing them online.