1) store passwords in the password manager, even the ones you think aren't important.
2) backup your data
1) store passwords in the password manager, even the ones you think aren't important.
2) backup your data
Losing the password that unlocks full disk encryption (FDE) is like losing the password that unlocks your password manager. At some point you have to have something stored only in your mind.
Now sure you could have your FDE password stored in a password manager as well but that's probably not a good idea. Also, compared to just about everything else saved in a password manager, you'd have to manually type the FDE password at boot. You can't copy/paste it as if anything your password manager would be running on a different computer.
A sticky note at home is reasonably safe, unless you're legitimately worried that a dedicated person may target you specifically.
Not "nation state" secure, but I'm reasonable sure it's well beyond petty thief, curious cow-orker, 4chan/anonymous, or local LEO's capability to subvert.
"Not Passwords" :D
How the hell do you remember randomly generated gibberish of a length that would be cryptographically secure?
Multi-word passphrases work great for me for everything that has to be kept in my mind safe. If I had to remember things like "LOZOktjR33IxVbACQsgicUtDubOyz9o2" I'd definitely have to drink less.