​Making a Flier: 

Information, Keep it Simple & Brief with picture
Bold Lettering for Lost Dog. Have your phone number clearly presented. Letter carefully and clearly. Tear off phone number tabs are good.
Pet's Name.
Brief description, keep something back from the public for you to know if scam or not. 
Give the location and date last seen.  Most of the time rewards are unnecessary.  If you choose to offer a reward just say, "REWARD"
Ads - local papers
Communicate -social network/media, neighbors - fliers in
mailboxes
Post on Craig’s List
Leave a smelly article of clothing outside nearby the farthest on record of a dog being able to scent is 40 ft underground, 80 ft underwater and more than a mile away! No kidding.

The microchip within is very small like, a grain of rice. It is not much different from a regular vaccination for the dog. The injection is over the shoulder blades roughly. It is possible for the chip to migrate toward the collar bone eventually over the years.

It is likely that a dog will get lost during its lifetime. Often at rest stops, gas stops and even at the vet’s office dogs can escape their owner. The backyard fence may have a portal into another world for your dog. At any rate, having a dog microchipped will give any owner peace of mind knowing that either through the animal shelter or a vet’s office their pet can be identified.
The most important thing to remember is to update the registration information.