What happens for you at the 30 minute mark? Do your thoughts start wandering? Does your ability to critically reason drop? Do you get feelings of boredom? In m

What happens for you at the 30 minute mark? Do your thoughts start wandering? Does your ability to critically reason drop? Do you get feelings of boredom? In my experience, focus can definitely be trained like a muscle. These days I easily get absorbed in a technical problem for 10+ hours, losing track of time, tiredness, and hunger. My process is pretty much quinticentially stoic, in the philosophical sense. The idea is to just roll with the punches. For me Deep Focus isn's so much a lack of distraction, boredom, etc. instead it's simply recognizing when I'm off track and geeting back on. If you're a bit relentless in this process, before you know it the distractions seem to wane off or, at least, one gets better at simply ignoring such thoughts and feelings. Anyway, there is surely hope in your case! Full disclosure, I'm formally trained in zen meditation---briefly lived in a temple for a couple yeas---so my method is heavily influenced by that, too. In general, you might get some mileage out of a meditation practice. Probably easiest to find some local group of practitioners doing things you resonate with. Anyway, 2cents from a fellow interneter.