In this article, I discuss the 3 classic places: home, work, and communities. Then, I share ideas about what the Fourth place actually is.

Yes, Home, Work and Communities can be combined to form cool new places for people to live, work, and grow. But everyone needs a space to think. And few people seem to actually consider that "place" as important. IMHO, they're missing out, and would really benefit from properly designing and taking care of their Fourth place.

TL;DR: The Fourth place is everywhere you think, and it can become much more valuable/powerful with a Personal Knowledge Management system.