Today I walked approximately 9 miles, though it was over five total trips. A two-mile walk has gotten to be pretty routine for me.
In between stepping out, I read a New Yorker article about "treadmill desks" that you can use to walk at low speeds while working. It sounds funny, but it's supposed to be much better for you than sitting (and I know how bad sitting can be).
I also read a very short article about "life-editing"; living in a single room that can be configured to meet different needs. For example, changing it into a bedroom, office or dining room by using Murphy beds, sliding dividers and pull-out surfaces. Building-wide common areas (such as a professional kitchen) and shared resources (eg., power tools) play a role too. As an aside, it mentioned that people used to walk much more, and those walks became opportunities to socialize with neighbors.
Maybe others will swing around to these ideas. On my walks around town now, I can go long stretches without seeing anyone, and most people I do see have just gotten out of a car. I feel out of step with people in a lot of ways, but maybe I'm just a step ahead of them.