ok, well, i'm not sure how to advise on it beyond that you have to do it compulsively. there was quite a number of instances where i was on meth and practically spent the whole time typing my thoughts out, and i kept on doing it until it hurt or i needed to pee and then i was still thinking about what i was going to write next, while peeing, and hoped i wouldn't forget some great toilet insight.

really, just write, the real art of it is about getting fluent, and mastering touch typing is really key, i think. you can't write like this without ... typing. writing it on paper you get a lot more time but even then, i suppose... when i was in prison i had tiny amounts of paper and pens so i started writing like 7pt font size all squished together