Microsoft researchers have come up with a way to help people remember passwords - have them base them on pseudo-Rorshach-test inkblots. Turns out everyone sees and describes them differently, so if you string enough together, the description each person comes up with will be pretty difficult to crack. Take a look at the test blobs on the MS website. I'll post what I saw as a comment, so it doesn't influence you...
[via Slashdot]