I'm a desk jockey, so my job unfortunately is sedentary. I live about a half mile from my office, and I walk to work every day. I also usually walk home for lunch. That adds up to about two miles a day during the work week. I also mow my rather large yard with a push mower in the warm months, and I heat my house mostly with wood during the cold months. Both of those chores involve a couple hours of moderately intense effort per week on average. I kayak and canoe a lot on the weekends during the warmer months as well.
I probably don't get as much exercise as I should, but it could be a lot worse. Luckily I'm not very prone to putting on weight, and I also keep a pretty healthy diet, so I stay in decent shape easy enough as far as weight goes.
For a few years in my late 20's I was very into weight lifting and the corresponding diet, and I was in very good shape. However, the fitness lifestyle is really just not for me. I do keep telling myself I'll at least get back into a pushup / pullup routine, and then I'll successfully stick with it for a while, then fall off again.