Here's a fine comic from xkcd that made the rounds a few months ago. We confess to being guilty as charged as to encouraging users to concoct passwords like Tr0ub4dor&3—while then telling everyone not to post it on a sticky note on your monitor. Passwords like correct horse battery staple are certainly much simpler to remember. Of course, we do require an uppercase letter and a number somewhere in your password, but that should be easy enough to work into a more memorable password.

Here's a much more technical article going into the why's and what's and how's of such passwords from the Dropbox tech blog.

Aaaand, if you're so inclined, log in to Populi, go to your profile's Info tab, click the gear, and select Reset Password...