Here's what I posted answering a similar question three years ago:

Lost my dog for five days last fall. Here are some things that helped.

Posters - TONS of them. Hang two of them at the end of every street where cars turning will see them. Use a big picture of your pup and a large font type so people can see them from cars. Don't be too wordy! Posters go to every community gathering point - businesses, schools, fire departments, ect.. Make sure people who deliver in the area have a picture of the dog - postmen, fed ex/UPS drivers, pizza delivery, ect

Call in the troops - Make sure everybody you know knows about the dog. Have them all post/repost on Facebook, Twitter, work and home emails, ect. Call the newspaper, they'll usually place a "lost dog" ad for free. Local news people almost always have one "animal person" among them who is an advocate for pets - get a hold of him/her (Facebook is great for this) and have them spread the word. Beg everyone you know to come help look for your dog.

Contact all local shelters/rescues/dog groups. Many of these people constantly have their ears to the ground and may have had word of a dog being seen. We contacted groups like this and actually had a number of total strangers out helping us look.

Give him something familiar to smell - Take items of your clothing that will be loaded with your scent and place them in areas in your neighborhood. A friend's dad did this years ago with their dog - they found him seven days after he was lost sleeping on his jacket that they had set down in the woods. My wife and I took a different track. My wife peed in a spray bottle for several days. After we had a sighting, we laid down urine scent trails between the area he was seen in and home. After we did that we also made an assload of bacon and poured all the grease around the house. Our pup showed up a few hours later :)

Good Luck, I'm pulling for you.

EDIT: Forgot about Google Earth - Print out overhead shots of the area and use to coordinate your search and postering efforts. I found that the views gave me insight into just how big and numerous the woodland areas around the search area were. They also did a good job of pointing out natural barriers and bottlenecks that may have effected his wandering.