3- Writing down your password rather than saving them on your computer is a better idea. I have a small notebook which I keep my passwords.
I also have a word document which I save some of my private keys, it is a locked document - not so safe I know...
This is still a very bad method to be honest because once the document file that has your private key has been bypassed your coins will be vulnerable to the hacker.
It’s best not to associate your private key or secret phrase with your computer or online and that includes saving them in a notepad or Microsoft Word.
I had written some of my private keys to a paper but not all of them really contains something worth stealing anyway.
