When I learned how to touch type (yes, I know I'm old) I was so excited I even dreamed about typing, and could mentally see each finger hitting the different keys. When I learned how to play chess I obsessed over the game, dreamed over chess moves, when I discovered computer chess I played the game for months on end and little else. When I got interested in raising aquarium fish, I didn't have just one tank, but rather soon enough I had 100, and I was buying and selling them too. If I research something of interest to me, I bookmark pages and pages of websites, and then keep going back through them, and spend weeks, months, or years obsessing over the details and trying to learn every part of it. Often I've then tried to turn them into some kind of profit ventures, too (with, varying results). I've sometimes had information spread all over the floor to the point the whole room was covered, and categorized. People that know me have told me if most people study something they go into it a little bit, but if I study something, I go into the ramnifications of it like 10 times deeper. Those are some examples of focus from my own life.