Ask HN: What's the most valuable thing you can learn in an hour?
One of the most valuable things that I have learned, which you can learn the basics of in 30-60 mins or less, is how to meditate (Vipassana).  Basically you sit and close your eyes and focus on the feeling of your breath below the nostrils.  When another thought comes into your mind, bring your attention back to the sensation of the breath coming in and out of your nostrils.  That's pretty much it.  And it is the only thing that was able to treat my panic disorder, and I tried many other things before meditation.It's also helped me in many other aspects of my life, but mostly because it has help my peace of mind.