Pick a random string of 10 letters, numbers, and symbols, making sure at least two of the letters are capitalized and the entire 10-character string doesn't spell any kind of recognizable word or phrase.  Now memorize that 10-character password and use it to log into important websites and things like that. 

That's the stupidest thing in the history of the universe.  Yet more and more, I'm forced to do exactly that.  I truly believe longer passwords are less secure than shorter, more memorable passwords.  What do I do with all my stupidly long passwords?  I write them down, thus committing the cardinal sin of passwording.  I keep all those passwords in a password-protected document, so there's at least some amount of security.  But honestly, it defeats the purpose of having a password in the first place.  There's no way I can remember these passwords, and it would be stupid to use the same password for everything.  I'm forced to write them down or click on that link that says "Forgot password?" every time I login to a website. 

I'll take a wild guess and assume my method for storing passwords is actually more secure than the method used by most other people.  I've seen passwords written on pieces of paper, stored in a desk drawer, or carried around in a wallet.  This obviously isn't a viable solution, but it has solid rationale:  What if you forget the password to the computer where your password-protected document of passwords is stored?  You can't argue with that. 

To you nameless, faceless people who invent password requirements:  I can assure you, longer passwords are less secure. #technology