Gym membership. Previously I was doing some working out on my own, but it's nice to get out, and easier to bring friends along.
I did the typical thing: first week of January signed up to the YMCA and committed to a couch-to-5k, and have to admit I'm feeling a lot lot lot better.
...up until now, I actually thought that we were friends. I guess all those deep meaningful convos we had whilst playing Burnout2 and drinking diet Dr Pepper meant nothing to you...