Yoga, running, and pushups. I'm not super consistent with all three all the time (not living up to my potential has always kinda been my thing), but those are the ones I go after. Running is the most consistent, which I'm now realizing is surprising to me since it's the most time-consuming of the three (the way I do it). But I did cross country and track in high school, so I guess there is more of a history, habit, and passion with running.
I drink as much beer and coffee as I want but eat very healthy, and it seems to be working for now (I'm 33).
Btw, just as a fun aside, my brother recently challenged me to do one pushup a day for a month. Obviously, the pushup is not the hard part--it's the consistency. Without being very careful about it, one just forgets to do the damn pushup. Somewhere in the 3 week range, I forgot and missed a day. It's an interesting feeling to mess up something so simple...almost revelatory about human nature.