There's actually a huge body of psychological research on what, exactly, creates and boosts flow. In a nutshell, it happens when an individual with high skill m

There's actually a huge body of psychological research on what, exactly, creates and boosts flow. In a nutshell, it happens when an individual with high skill meets a problem that they find subjectively challenging, while working with a certain degree of autonomy. There are also personality types that can slip in to flow states more easily (this is known as the autotelic personality, though research on this is a bit sketchy), and there's some evidence to show that flow can be artificially induced through a process called trans-cranial direct current stimulation. Google Mihaly Csikszentmihalyi if you're interested, he's spearheaded a lot of the research on this stuff. I wrote a pretty significant research paper about this stuff once upon a time... one of these days, I should sit down and write up a proper blog post on it.