Got this from one of my Twitter friends - Yard Sale Treasure Map. If you love to garage sale this site is like a dream come true.
You put in your address and tell how far you want to travel. It then lists sales in your area. You add your address and it maps the best route for you. Print out the directions and you're set to go. I'm not sure if it works everywhere in the US so try it out!! I've got my strategy all mapped out for Saturday!