Tags and microchips can help reunite an owner with their pet, but it would also be wise to keep a recent snapshot (or several) of the animal readily available. Create easy access to electronic copies of pet photos, which can then be posted on community websites such as Craigslist or Facebook, as well as distributed quickly and widely via email or text message. Have printed versions on hand, too, just in case you're in a situation where power is knocked out.
On that note, if the electricity is out of commission, the copy machine will be, too, so you might want to go ahead and make several copies of a flyer with the word "MISSING" noted across the top, as well as your pet's name, photo and your contact info. Don't forget to account for how you'll need to post fliers (tape, staples, etc.) and keep those supplies nearby as well.