How to draw a city block in perspective

This is a video that shows you how to draw a city block in perspective.It starts off showing you how to draw a grid of squares that are all the same size in perspective. It's very hard to explain perspective in writing, and though it seems extremely complicated when you don't know what's going on, once you 'get it', then it's easy. I hope this helps a little bit. I learned my perspective this way, from watching someone else draw using vanishing points. Before that, I had looked at tons of books but I could never figure it out. I hope that showing what I'm doing in this way will help.

Tools:
Photoshop
Camtasia Studio
Wacom Tablet