I jumped out of an airplane for my first midlife crisis (right after getting myself a leather jacket). For the second one, I bought a hot new vehicle (Trek Pilot). I'm sort of looking forward to number three. (None of these has been tied to birthdays specifically, though.)

I really recommend doing a parachute jump. It's so beautiful up there. Or I'd try SCUBA maybe, or something?

Or a really good walk with your pup! That's always good.

Happy birthday soon.