About a month ago, I'd made myself get off the train a couple of stops up from my usual, and walked 3 km home (instead of the less than 1,000 m from my nearest station), and as I walking I asked myself why I didn't do this any more often than once a fortnight - it didn't take a long time (about 30 minutes), I enjoyed the time to reflect on the day I'd just had, and the 3 km was enough to warm my leg muscles up without overworking them, meaning I could easily do the same day after day.