As a coder and some-time Tetris player, I'm always trying to get back to that state of awesome productivity called "flow". I always thought it was something that just randomly happened, or might be easier to access if you set up the right environment and waved a chicken about, but apparently there's more to it than that.<p>The most useful slide of the entire presentation is also on the man's Wikipedia page: <a href="http://en.wikipedia.org/wiki/File:Challenge_vs_skill.jpg" rel="nofollow">http://en.wikipedia.org/wiki/File:Challenge_vs_skill.jpg</a> I think I'll need to stare at it for a while longer and think about how those emotional states relate and how I might artificially jump from one to the next.