Park the car and start hoofin it! Walking is not only better for the environment but it is better for you. While you're sitting there head on over to Walk Score and see what your home's walk score is. Walk Score takes your address and finds local businesses, and determines how "walkable" they are. This is a great resource for people that are in the market for a new house or apartment and want to quickly determine how pedestrian friendly a neighborhood is. It can also be useful for people who plan on staying put but giving you a reminder of how easy it would be to do some of your local travel by the way god intended.
Whether you are a hardcore pedestrian or you are still weening off your car, here are a couple mapping tools that can help you get out an hoof it, and maybe find some interesting things along the way...
Map My Run is a great site for runners, bikers and walkers that allows you to map out a route on the computer, calculate the distance, the calories you'll burn and save it for later. This site also has a number of other tools that let you plan stops, keep a log or look at other peoples routes.
Every Trail is similar to Map My Run but is great for people that like to get off the beaten path. Every Trail allows you to plan out off road adventures, or you can log your meanderings with your GPS unit and map it out after the fact.
Community Walk is another great mapping resource that focuses on exploring your community. Like the other sites you plot your path on their interactive map, but on this one you tag points of interests along the way. You can mark of good restaurants and add your review, you can upload geo-tagged photos tor video to provide a visual chronicle of your favorite pub crawl. Or if your looking for something to do, check out the maps people in your community have already made and get a little pedestrian inspiration!