One could also use Shamir's Secret Sharing algorithm to have a number of your peers hold your secret key without them being able to access it. When you've lost

One could also use Shamir's Secret Sharing algorithm to have a number of your peers hold your secret key without them being able to access it. When you've lost the key, you have a subset of the peers reproduce it for you, by sharing their portion of the secret. Cryptography is pretty great.