I try to live in Skill Sprints that direct focus for a few years. I pick things that combine history, books, places and tool mastery like photography, music training, cooking, core muscle exercises or even Buddhist Pali suttas and walking meditation. You have to create your series of time boxed challenges. With a daily drumbeat of global finance news and HN it keeps me out of trouble. Our notational computer process logic and memory access hierarchies turn out to describe almost everything worthwhile. [ed. Did not want to skip music training.]