Remove obstacles from lawns, steps and porches when expecting trick-or-treaters.
Indoors, keep candles and Jack O' Lanterns away from curtains, decorations and other combustibles that could catch fire. Do not leave burning candles unattended.
Indoors or outside, use only lights that have been tested for safety by a recognized testing laboratory. Check each set of lights, new or old, for broken or cracked sockets, frayed or bare wires, or loose connections.
Discard damaged sets.
Don't overload extension cords.
US Consumer Product Safety Commission