Create strong passphrases with EFF's new random number generators! This page includes information about passwords, different wordlists, and EFF's suggested method for passphrase generation. Use the directions below with any set of dice.And now, a message from internationally renowned security...
This is really good for encrypted content such as a hard drive, password vault or gpg key
Neat, and if you want a physical item to prompt you to do so https://www.crowdsupply.com/dicekeys/dicekeys can be an interesting option.