Welcome Preppers and Survivalists,
Fire is a two-edged sword; it is a lifesaver and a lifetaker.
During an emergency, especially in the wilderness, fire is the same priority as shelter, so preppers and their families should carry two or three methods of starting a fire for warmth and signalling. One method is the typical book of matches stored in a waterproof container, such as a ziplock baggie.
Another method of carrying fire, during a trip to the park, is strike anywhere matches stored in a waterproof match holder and placed in your jacket pocket.
You and your family can carry butane lighters. These lighter can be disposable or refillable. If you buy a refillable lighter, you will need butane and flints.
A modern method is firesteels. They come in a variety of models and price ranges.
Lastly, there are even more modern devices for starting fires.
OutdoorPros.com - Learning Center: Zippo Buying Guide
Izismile: In Fun We Trust - What to do with Lighter Parts