Seconding long walks. It's easy! You just look around for something interesting, and let your feet carry you toward it - they know what to do, and they will if you let them. Repeat as necessary. When you start to run out of puff, look for interesting things nearer home than not.

Stay away from roads and sidewalks, if you can. Trees give shade, and shade is cool and pleasant and helps you husband your energy for finding interesting things, rather than sweating.

Keep your phone in your pocket. Keep your earbuds there, too. They put you somewhere other than where you are, and what's the point of that? Besides, you can't chat with people if your ears are blocked.

Chat with people. Say hello. Make eye contact. Exercise the social skills that help you make unplanned interactions mutually enjoyable. We don't do that any more. We should. Many fear it. Do not blame them. Give them the opportunity to overcome that fear, if they so choose. If they don't, leave them in peace. Another time, perhaps.

Pictures are okay, but be sparing. Use them when there's something you'll want to share. Don't use them so much that you forget why you want to share something. Me, I'm an amateur photographer. For me, pictures are often part of the point. Unless they are for you, too, use them as aide-memoire - not in place of it.

Cut through the woods. Go up hills. Go down hills. Go through streams, or over if they're narrow enough. Remind yourself of the simple pleasure to be had in using your body - jumping, climbing, shifting your balance to go down a 45° slope on your feet instead of your face.

Take chances. Don't shy away from decrepit buildings. Investigate them. There's always a way in, and it's amazing what's to be found there. Be aware of your environment, and be careful - not everyone you meet this way is friendly. But many are. Don't let fear hold you back, because you'll always wonder what you missed. And this life is transitory, anyway. Don't waste the opportunities that come along while you're living it.

Wear shoes, sturdy and comfortable as you like. You don't want the thing that holds you back to be that you'll tear up your feet if you go that way, either. For buildings, I recommend eight- or nine-hole logger boots - welted full-grain leather with good, arch-supporting insoles. Take care of them. They'll take care of you.

(I always wear boots like that. I may be biased in my recommendation. But they've stopped more holes than I can count from ending up in my feet. Wax polish, thinly applied, and buffed in long strokes with a damp - not wet - rag. No dress shoes ever looked so fine.)

Above all, enjoy yourself. Enjoy meeting the people and places you meet. Enjoy your environment, and the changes you make in it over the course of a day's peregrination. Enjoy the changes your environment makes in you. Enjoy not giving a fuck about email and parking. Enjoy the feeling of using your body, instead of just inhabiting it. Enjoy being where you are. Enjoy the ache of well-worked muscles and the stretch of your ribs as you breathe deeper than you can when you spend all day sitting down. Enjoy the deep sleep that comes of exhaustion honestly earned. Enjoy the fresh eyes with which you wake. Enjoy a simple pleasure no longer forgotten.

Enjoy!