Free time is too chaotic to pin down, lately. Time required to keep friends skyrockets when people move around and you can't clump your socializing. Being tapped recently to help establish a salon didn't help. Weather getting cold means I have to look for a decent gym rather than going out for a jog. And then sometimes I sit down, break out an old favorite book or video game, and next thing I know there's a sense of lost time and amazing adventure.
(Okay. That's a bit of a cheat. A lot of the above comes when I give somebody a funny look and say "you've never read/seen/played/heard X?")
That, and getting into other perspectives. Given a bit of time and nothing throwing me off-balance, I can get a fairly solid idea where somebody else is coming from. It may not be a right or even a healthy place, but at least I can find the angles from where things do look like they say.
If we meet, you will watch Wet, Hot American Summer, Before Sunrise, and most likely something Whedon-based. You will also read Good Omens. We can raid each others' libraries after that, but those are non-negotiables.
Water/sunlight/physical activity. All three are vital energy-givers. Missing out on any of the above quickly makes things feel sluggish and dull.
Good conversation/TV/movies/books. Actually, let's just file this all under "things that broaden my horizons". Things that force me to constantly adapt and evaluate are good things.
My phone. Yeah, I'm one of those people. It stays in my pocket when I'm with people, but there's something nice about looking up anything under the sun when I have time to kill already.
Modern western medicine. I'm not a pretty picture without.
My surroundings, in both purely mundane terms as well as atmosphere. I like to pick apart interesting landscapes or architecture, and I can be a total mood junkie.
Psychology/sociology, in the sense that meshes game theory with cognitive science. What makes us tick, how personal behaviors turn into social trends, that sort of thing.
Reading or out for a walk. Summer only lasts so long, and sometimes the simplest pleasures are the best.
And at risk of seriously dating myself - because if I don't, who else will - the same thing I try to do every night. Try and take over the world.
You have an apocalypse survival plan that doesn't involve the reanimated dead.