Seconded. I'll throw my two anecdotes on the table:
Anecdote 1: I used to work management, and routinely got good results via "please" and "thank you" because I was raised to be polite. Other managers in the same company often got poor results using rude/bullying techniques. That said, I'd estimate that "politeness" was one of the less significant factors to one's success either way.
Anecdote 2: Working retail, I found that people who were especially rude were usually low-status. The exceptions were mid-status people who seemed to very badly want to be high-status, and people who had a pretty good reason to be rude due to previous experiences. (And the latter category was the only time I've ever felt rudeness was acceptable)
I'll admit my method is flawed, but the idea was closer to asking for something beyond what is expected without acting as if it is a huge request, treating it casually.
The "not saying please" thing struck me as a good method for ensuring it stayed casual but I can see that would probably come off as rude - politeness is surely a charachteristic of most productive behaviour.
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.