Memorize it in the form of a BIP-39 mnemonic[1]. 12 words are enough to encode 128 bits of entropy and a 4 bit checksum. [1] https://github.com/bitcoin/bips/bl

Memorize it in the form of a BIP-39 mnemonic[1]. 12 words are enough to encode 128 bits of entropy and a 4 bit checksum. [1] https://github.com/bitcoin/bips/blob/master/bip-0039.mediawiki https://github.com/bitcoin/bips/blob/master/bip-0039.mediawi...