>I agree shorter workouts are much easier to stick to though, especially since I'm easily bored.

Walking is one of the best mild exercises, if you can do it in a safe place, where you can't trip or fall into a hole or be mugged (or some other risk), because you can think while walking. So you can use the time to think about your work (if applicable, like for software people, at least in some cases), or your life, or anything else. You can also not think deliberately (although thoughts may come anyway), and just enjoy the walk.

For example, I think about my side projects while walking, and have been surprised to find that I have sometime made good progress on some of them while doing so.