"Nothing" is a bit of a stretch, but it's true that milestones pretty much stop happening for much of adulthood. I've traveled, I've dated, I've moved and changed jobs. But I don't want to fall into a rut, so I've been working to give myself a new "milestone" every year. Last year I achieved a key certification for work. The year before, I learned to identify every country on a map. The year before that, I learned how to solve a Rubik's cube. Other things have been learning to knit, identifying every nation's flag, and learning to fly an airplane.

I'm not sure what to aim for this year, but I'm open to suggestions.