Make sure cords do not dangle from counters and table tops where they can be pulled or tripped over. If your cord lacks safety closures, cover any unused outlets with electrical tape to prevent the chance of a child making contact with a live circuit. When using live evergreens at home, select a fresh tree. One freshness test is to lift the cut tree a couple of inches off the ground and bring it down abruptly on the stump end. The outer needles should not fall off in substantial numbers.
Inner needles do turn brown and shed naturally each year.
When a tree is first cut, a seal of sap occurs naturally over its stump to keep moisture in. It's important to break that seal to allow the tree to take up water needed to keep it fresh during the holidays. Cut trees should be placed in at least a one gallon container of water. Add water daily as needed. Be aware of which plants are poisonous and should be kept out of the reach of curious children and pets.