Think of a phrase you will always remember. Keep typing until the text on the right says “strong”. Punctuation, spaces, unusual words and mixed case while not required, are generally a good idea. The most important thing is that the script considers it strong.
Make sure this passphrase is impossible to guess by people who know you, e.g. don’t pick quotes from your favorite song or movie. Don’t ever write it down or save it on your computer in any way or form!
Think of a short keyword describing a password, e.g. “amazon”, “gmail”, etc. This word has to be easy to remember and there is no need for it to be unique or hard to guess.
That’s it! You can regenerate any of the passwords above at any time by coming back to this page, all you need to know is the passphrase (and the keywords).