Pick an animal like a cat or a dog and follow it around staying clear of his area of movement. Keep with it from place to place as you mind to make the least amount of noise and movement (hand gesture and head movements which are not doing anything for you) and through this you will get to know and appreciate the circle we form around ourselves in terms of comfort and reaction. It is different when we call for or move toward a person than when he approaches us. Make a note to be aware of this and how better you can move and breathe to clean the building tension in you and you can create less tension in others in your movements and thoughts. A street dog or a cat are a good place to start in places where they are not lunch and in nature after a while you will begin to note the circles of awareness you have according to your senses as you let go of the tension under the trees.
Deserts also work well for this if you have water.