If the tree is stored outside, keep it out of cold, drying winds and the sun. Snow or rain won't harm the tree, but heat and sun can dry out needles quickly. When the tree is brought in for decoration, make a fresh cut across the stem butt at least an inch above the existing cut. The reservoir of the tree stand should be filled above the base of the stem. Hansen also cites advice from Penn State and Cornell University to keep the home clean and safe during holidays.
Green needles can cause stains.
Use small amounts and blot with a clean, white cloth. Do not use carbon tetrachloride, gasoline or lighter fluid. Use fireproof decorations and light reflectors. Lights with brittle or cracked insulation should be replaced. A typical tree strand with 36 bulbs adds 250 watts to the circuit.