Exercise: Improvisatory dance. In my opinion, improvising is more useful than specific styles of dance (salsa, swing, waltz). Most people do not dance specific dances in common social interactions unless the social event is based around that dance. If you are at a club, you can pop and lock, b-boy, robot, liquid&digits, krump, while everyone around you does something else. Also, it's easier and more obvious to be better at improvisatory dance than the people around you.
I have found that attempting to teach others to dance in literal language doesn't work as well as using metaphorical, poetic, woo-filled language. That said, as a specific exercise: feel the energy in your torso and each of your limbs. Feel your connection to the earth beneath you-actually feel the sensation of your feet touching the ground-what parts are touching? The heel, balls, toes, pay attention to it specifically. Direct your focus and weight either towards or away from the parts of your body you find yourself noticing. Feel the energy in your limbs again, and let some of it out, to float in front of you: snap it out, or gently wave it, or pull or push or whatever your body intuits. Then move the now-floating ball of energy around, and let it move you around.
This is much easier to explain in person when you can see me doing it. I was originally inspired to dance by this TED talk by the Legion of Extraordinary Dancers, which is also where I got some of what I wrote above (the rest I got from my own experience and from the improvisation and choreography class I just took). If you enjoy this kind of dance, you will love the LXD web show
Recent brainstorming sessions at SIAI (with participants including Anna, Carl, Jasen, Divia, Will, Amy Willey, and Andrew Critch) have started to produce lists of rationality skills that we could potentially try to teach (at Rationality Boot Camp, at Less Wrong meetups, or similar venues). We've also been trying to break those skills down to the 5-second level (step 2) and come up with ideas for exercises that might teach them (step 3) although we haven't actually composed those exercises yet (step 4, where the actual work takes place).
The bulk of this post will mainly go into the comments, which I'll try to keep to the following format: A top-level comment is a major or minor skill to teach; upvote this comment if you think this skill should get priority in teaching. Sub-level comments describe 5-second subskills that go into this skill, and then third-level comments are ideas for exercises which could potentially train that 5-second skill. If anyone actually went to the work of composing a specific exercise people could run through, that would go to the fourth-level of commenting, I guess. For some major practicable arts with a known standard learning format like "Improv" or "Acting", I'll put the exercise at the top and guesses at which skills it might teach below. (And any plain old replies can go at any level.)
I probably won't be able to get to all of what we brainstormed today, so here's a PNG of the Freemind map that I generated during our session.