1½ hours of Ju-Jitsu twice a week, and occasionally climb a few mountains when I can get away.
Not as much as I used to do, but better than nothing and good for the soul - the combination of full physical and mental attention is not unlike flying, although you end up with a few more bruises.
Interestingly my sensei flies a Yak-52, although we only met through martial arts. What that tells you I'm not sure.
G