If your dog is missing, you will probably want to start with this free online guide to finding lost dogs.

Please note: I am trying to keep up with the requests for help with lost cats and dogs.  However, I am going to have to start limiting myself to an 80-hour work week simply because I have other obligations.  I will try to return your phone call as soon as I can.  During peak demand, it might take me a day to call you back.  I understand that your lost pet is an emergency, and I apologize if I can't respond to you in a timely manner.  You stand the best chance of getting help quickly if you fill out the contact form and include a few basic details about your lost pet.

Make your lost pet fliers interactive so they never become outdated.
Books I've written about finding lost pets.  You can instantly download an ebook telling you how to find your lost dog or cat. 
Articles on Seattle DogSpot about searching for lost dogs.
Other resources:   Roaming Paws.  Lost & Found Pets WA State.  Lost Dogs of King County. 
Lost Dogs of Snohomish County.  Seattle Animal Shelter. Regional Animal Services of King County. 
If you see a dog running loose, with no known owner, please contact Useless Bay Sanctuary for help.