"Be careful with fire," Nickey warns, "The last thing you want to do is set a forest fire." If you let a fire get out of control, it might be the very thing that kills you- and perhaps others as well. With signal fires, follow standard safety practices for where you build and how you manage the blaze. A signal mirror can be seen for many miles, but it is directional, flashing a narrow beam that can be spotted only when it is aimed directly at the viewer. To make a signal mirror more effective, sweep the horizon, back and forth, so someone on the receiving end will see repetitive flashes of light and be able to zero in on its point of origin. If you hear a plane overhead, sweep the sky in the direction of the sound. When the plane is in view, don't hold the beam on it and blind the pilot. Sweep past it several times until the plane makes a pass overhead and has a fix on your position. If you don't have a signal mirror, use whatever reflective surfaces you have, even the shiny lid from a pot, a CD or a tent pole.