Here's what gets me out on my (somewhat) daily 4-miler: the scenery is both a distraction and a payoff.
Fields of green and gold
Shady, winding roads (the better to think on, my dear)
Sunlight through the trees (and, oh!, the hill...huff, huff)
And then my favorite part: the scene opens up and the sky is wide
(reminds me of home)
What a vista. Chat with a woman in the field about a bird's egg she's found. Say hi to the horses.
Lean over, hands on knees. Breathe. Stand up, retrace steps, and head back home. (Downhill now!)
Splay on the grass for a few minutes' recovery and sport a red exertion face for the next hour.
Want to host a tour in your neck of the woods? Post scenes from a walk/run/ride around your neighborhood and leave the link in the comments here. Armchair travel, my favorite!