Where do you store those? I would imagine that at least: (a) these should be on "the cloud" and (b) encrypted.
What's your current process of doing this? Do you just store them in your password manager (e.g. in the "notes")?
One of the few actual hard-copy things I have. Don't write down any other passwords. One of them is to my password manager, so storing it in the password manager doesn't really make sense.
I print them out and keep them in the safe. I have 2-3 codes for each of my most important accounts in my wallet, with unrevealing names (nothing that anyone but me would associate with a certain account).