Cool use of Google maps

Click on over to the Gmaps Pedometer and you can see how far your last walk was. By clicking to set a series of points, you can get a fairly accurate measure of the distance from one place to another.

(I know, you're saying, "there's a scale, just use a ruler!" And you can...but unless your route was a straight line, things get a bit tricky. Gmaps Pedometer allows you to break your trip down into a series of straight lines.)