While decorating your tree, if you must stand on something to put ornaments on the higher branches, be sure to use something designed for that purpose, like a step stool or a step ladder. When working up high, always move slowly, so you keep your balance. Also, don't overreach. It is much better to get down, and move your step stool or a step ladder, and get back up, than in is to risk a nasty fall. The emergency ward is no place to spend Christmas.
Fireplaces are very popular during the holidays.
Before starting a fire, remove all decorations from the area and be sure that the flu is open. Do not burn wrappings or evergreen boughs. These can burn extremely fast, throwing off sparks and burning debris. Safely dispose of wrapping paper with your normal trash collection. Better still, reuse and recycle.