The Where's My Car app can give directions to where a car is parked. However, if your car is in a large parking lot, it is not much help. Add a label to the app that tells the user what direction, NE, NW, SW, or SE, to walk to get to their car. Note, the direction the user should walk should be updated whenever the user's location changes, but not when the screen is initialized.
Telling the user what direction to walk isn't much use if the user doesn't know what direction they are facing. Fix this by adding a compass to the app. In the component designer add a canvas with one image sprite. The image sprite should be centered in the canvas and should have the image of an arrow. Use the azimuth of the orientation sensor to set the orientation of the arrow sprite so that it always points north.