From marmota: Weight Watchers works because it's an RPG. Very cute article. And it makes a lot of sense...
From mistervimes: Cornhenge. Yes, Cornhenge.
NYT had a list of random online psychological tests you can take. Some of them were interesting:
Sanity Score - I'm at 83% sane... more to the point, this actually gives you some good data and educates you about your results.
Project Implicit - now this is interesting. Ever wonder about your implicit biases or prejudices? This site can tell you all about them. The test I took was a little annoying (you're required to do really fast associating), but the results were educational. For the record, I took the gay/straight bias test, and I apparently have a slightly more positive attitude toward straight people than gay people, which is odd, considering the cross-section of my friends. (Be aware that some of these results can be disconcerting.)
You Just Get Me - a very cute personality test. Adorable, even. I'll post my results later.
Face Research - I loved my results from this one, and wasn't in the least surprised by them. As it turns out, I not only prefer more masculine faces on men, I even prefer a slightly more masculine face on a woman, too. Well, hell, I could have told you that. I'm not really big on the soft, rounded look, I never have been. The voice test is interesting, too.