FAQ #71 has the following paragraph:
* Use a password that cannot be easily guessed. A combination of letters (both lowercase and uppercase) and numbers is recommended. Avoid using the same password that you use on any of your other Internet accounts.Many people (especially Support requestors ;-)) are reluctant to using a complex password because they're afraid they can't remember it. I would like to add a paragraph that gives an example of how to construct a secure password that's easy to remember.
A good way of constructing a secure password that you will still be able to remember easily is to use a "password phrase". For example, the following phrase:John, look! My LiveJournal "rocks".can be made into a secure password by using the first letter of each word and some of the punctuation marks:J,l!mLJ"r.Of course, you should not use this particular example given here, because it is publicly visible in this FAQ.