Winter is a quiet season. The birds that woke us up all summer have flown south; there are no crickets and frogs singing. But even in this hushed stillness there is activity. So find a spot where you can sit, and close your eyes and listen. As you tune in to the different sounds of winter you might hear beech leaves flapping, a chickadee calling, a squirrel scolding you from the trees above.
Try making a sound map in your journal. Note what you hear in front of you, to the sides, behind you. Sketch the arc of a jet passing overhead, the traffic noises, a dog down the street.