Twenty years into my career, I no longer feel any pressure from acute knowledge gaps as I have a better perspective on the limits of my own skills and retention

Twenty years into my career, I no longer feel any pressure from acute knowledge gaps as I have a better perspective on the limits of my own skills and retention. That said, what got me where I am today was obsessive curiosity about how things work combined with a bit of workaholism. I have gone through periods of higher and lower engagement at different jobs, but one thing is common: when I'm highly engaged I have a hard time unplugging on nights and weekends. It's not based on a misplaced obligation to work, but just the way my brain works. Value judgements aside, whenever I started getting stuck in my own head, the best way is physical activity. Low intensity activities like hiking are great for working through problems and giving myself a new perspective. If I really want to unplug my brain completely the trick is amping up the intensity with some kind of athletic or skill based component. Personally I like mountain biking, snowboarding and weight training, but the important thing is that it be something you enjoy and can give you a sense of accomplishment/progression in the physical realm.