Diceware - Creating strong passwords

Diceware is a method for creating passwords using an ordinary die from a pair of dice as a random number generator.

The concept of Diceware was created by Arnold Reinhold in 1995. At that point he considered five words (64 bits) the minimal length needed by average users. However, starting in 2014, Reinhold recommends that at least six words (77 bits) should be used.

For each word in the passphrase, five rolls of the dice are required. The numbers from 1 to 6 that come up in the rolls are assembled as a five-digit number, e.g. 43146. That number is then used to look up a word in a word list. In the English list 43146 corresponds to munch. Lists have been compiled for several languages, including Chinese, English, Finnish, German, Italian, Maori, Polish, Romanian, Russian, Spanish and Swedish.
https://en.wikipedia.org/wiki/Diceware

You can use the diceware wordlist and create your own.
https://grempe.github.io/diceware/

Or you can use an online diceware creator to help you do it
http://rumkin.com/tools/password/diceware.php


Or if you're really lazy, you could pay this enterprising 6th grader New Yorker $3 to create one for you. And it'll arrive in the mail.
http://www.dicewarepasswords.com/