I put together this quick HOW TO video on sketching in one point perspective. I was lucky enough to have an uncle who was going to art college when I was a little kid teach me perspective when I was probably about 10 or 11 years old. This video walks through some of the basic principles of drawing in one point perspective through an easy to practice drawing exercise. I also end with a time-lapse of a shoe drawn in 1 point perspective:
