The typical image of "meditation" in the west is the image of an individual sitting cross-legged on a cushion with eyes closed. The truth is, meditation can be many things, and we can take our meditative practice off of the cushion. The practice of walking meditation is a great way to divide up our sitting practice into segments so that our legs don't become too uncomfortable and distracting. It also gives us the opportunity to begin practice of a meditative quality to movement.
Wherever and whenever we walk, we can practice meditation. But what does this "meditation" consist of, you may ask? Quite simply, we are focusing our attention on the act of walking through our world. We simply walk for walking's sake. (Later, we can extend the observation to walking with a specific destination as well!)
The "first step" in cultivating this type of meditation is the notice how we initiate our movement, and to be present with each step we take. Focus on the movement, our balance, the contact our foot makes with the earth, and how our minds are while we move in the physical world.
When you are able to be present with your body in motion, extend that awareness to all that is around you as you traverse the earth. Notice the location, the sounds, smells, and visual objects that are present. Experience your walking as a rich and full experience.