Seeing your projects on Pinterest. And you didn't even pin 'em there! Someone else pinned my projects to Pinterest and then people started re-pinning them. Unbelievable. Why does something as dumb as that make my day?
Also, I finally passed 100,000 page views and there are currently 17 people looking at my blog. Right now. I've never really cared about the stats -- this blog is just my fun -- but wow. What a day.