How to Choose a Secure Password

This article by Bruce Schneier (a true security expert) is excellent.

Choosing Secure Passwords

Last year, Ars Technica gave three experts a 16,000-entry encrypted password file, and asked them to break as many as possible. The winner got 90% of them, the loser 62% -- in a few hours. It's the same sort of thing we saw in 2012, 2007, and earlier. If there's any new news, it's that this kind of thing is getting easier faster than people think.