Some best practice for passphrases, private keys, and saving them all in a digital wallet

Not your keys, not your _______________. But how do we protect our keys, our passphrases? What are some best practices to consider?

https://blog.coinkite.com/everything-you-need-to-know-about-passphrases/

If you’re not incorporating many of these practices into your digital self-sovereign life, then how self-sovereign can you really be?