I am fortunate enough to live where there is a nice one mile loop for walking starting and ending with my house.
Since my knees really do feel better if I actually get some exercise each day I am trying to be more faithful about walking.
I found a neat little ticker to track my progress at http://www.tickerfactory.com and am going to try to remember to update it. You can see it at the bottom of my blog. The little turtle is so me :)