Comments
More thorough evaluation of productivity techniques, particularly those based on some form of group commitment/incentive that couldn't easily be replicated by a lone practitioner.
One aspect of this: Which forms of "standard" business training actually seem to work well? I've heard good things about Toastmasters; what about Getting Things Done training? Cialdini's courses on influence? People have paid a lot of money for these things for a long time, which is no guarantee of efficacy but still hints that they should be investigated.
I've become pretty pessimistic about rationality-improvement as an intervention, especially to the extent that it involves techniques that are domain-general, with a large subjective element and placebo effect/participant cost. Basically most interventions of this sort haven't worked, though they induce tonnes of biases that allow them to display positive testimonials: placebo effects, liking instructors, having a break from work, getting to think about interesting stuff, branding of techniques, choice-supportive bias, biased sampling of testimonials, etc etc etc.
The nearest things that I'd be interest in would be: 1) domain-specific training that delivers skills and information from trained experts in a particular area, such as research, 2) freely available online reviews of literature on rationality interventions, similar to what gwern does for nootropics, 3) new controlled experiments on existing rationality programs such as Leverage and CFAR 4) training in risk assessment for high-risk groups like policymakers.