You want to start this list immediately, do not wait for the pet to come home on their own, because the longer you wait, the less chance you'll get them back. Search your neighborhood, and call the pet in a friendly tone. When you call them, tell them you have their favorite treat. Tell neighbors, mailpersons, and delivery person. A female calico isn't as clear as a female calico with a pink collar, and a white dot on her front left paw, and a brown dot on her left hip about the size of a half dollar.
Description is everything.
Ask your Animal Control Officer who else you can contact in your area. They will be able to provide you with information to help. Repeat the calls daily. This ten minutes could bring your pet home. Place lost pet ads in your local papers.