Utility lights should always have some type of wire guard over them. Heat from an uncovered light bulb can easily ignite ordinary combustibles. Don't misuse fuses. Never install a fuse rated higher than specified for the circuit. Investigate any appliance or electrical equipment that smells strange.
Unusual odours can be the first sign of fire.
Don't overload wall outlets. Two outlets should have no more than two plugs. In some cases, covering the burning metal with sand can help contain the heat and sparks from the reaction. If you are planning a project using a large amount of flammable metals you should consider purchasing a five or ten pound container of Class-D extinguishing agent as a precaution. It must be kept in a sealed container with a non-reactive solution to prevent contact with air.