Never use candles as decorations.
Keep tree away from heat.
Never use a cut tree in a place of public assembly (apartment or
hotel lobbies, restaurants, etc.).
Water a cut tree daily.
Use a "non-tip" style tree stand.
Use only fire retardant decorations.
Never leave a lit tree unattended.
Dispose of your tree properly, soon after the holiday before needles
Artificial trees should have a fire retardant label.
Unplug all lighting before retiring for the evening or leaving the house.
Blow out candles before leaving the room.
Don't leave candles burning unattended.
Purchase lights and electric decorations which are listed by an
approved testing agency such as Underwriters Laboratory (UL).
Check all lighting for frayed wires, broken plugs, sockets, etc.
Never overload outlets.
Use no more than three strands of lights on a single extension
Never use candles on trees, near live or other flammable decorations.
Never hang lights on a metallic tree.
Always use appropriate weatherproof lights outdoors.
on this page courtesy of the Massachusetts Department of Fire Services