Look for a safe path in the woods, or a back alley in the city and check the location each time you got there for obstacles, you should avoid cars and water. Select a time where passers-by are unlikely, then blindfold yourself and try getting as far as you can, record your time and distance and try to improve your speed and distance. Nobert's recommended blindfold is an inverted garment with hood put over the face.
Source: From the original site.(Submitted by: Norbert Grün)