Avoid keeping the tree indoors too long. Preferably, living trees should stay indoors no more than five days, with seven days the maximum. Be sure the root ball stays moist. Do not let it dry out. Use only small lights that are cool-burning.
Keep the tree away from sources of heat such as heater vents, the fireplace, T.V., etc. You may keep the tree in the garage for a few days prior to bringing it indoors and also after removing it from the house. Be sure to keep it watered at all times.