LOST CATS OR DOGS USE ELECTRONIC TRACKING DEVICES.

 They now have available electronic GPS tracking devices used for pets, hikers, and people.
Check out the different types of trackers that fit your needs.  Reviews are done by customers.

Cats or dogs dash out of your house.
when your cat dashes out of your house. What do you do next?
How do you approach your cat after they have gotten out?
Never run after them because this will cause them to keep on running.
Just leaving the door slightly open will encourage the cat or dog to come in
on its own.
Leave the door open. Than circle around the cat and herd it back in.
Here are some Internet pet sites.   
http://catsinthebag.org/

http://ljttraining.com/

Most cats hide under bushes, porches or even park cars.
Get down on your hands and kneesor other wise you won't be able to find
the cats obvious hiding places. Check sheds, garages even around the patio.
Majority of missing cats are likely to be found close to the owner's home.
Checking near by neighbors yards or backyards is a must do.
First get their permission to look on their property.

http://www.missingpetpartnership.com/