First, it's time to go green, as in fresh. If needles are dried up and falling off, move on, even if it looked to be the perfect one.
Now Camels can go months without drinking water, humans a few days. Christmas trees are neither though and they need water every day. A dry tree is a dangerous tree so don't forget the H2O.
In addition to water, you can prevent the tree from drying up too quickly by keeping it away from things such as heat vents, space heaters, and fireplaces. 3 feet is a good general rule. And in the way of keeping things away, never place candles on or near the old douglas fir.
Almost half of all Christmas tree fires are related to electrical malfunctions or failures.
So break out the elves and replace any string of lights with worn or broken cords or loose bulb connections. Follow the manufactures instructions, but generally, don't link more than three strands together. And turn off the lights when you leave, you won't hurt its feelings.
Now taking it down my make you frown, but after about four weeks, it's see you later time. Make it a New Years Resolution to protect your dwelling and get your dried up tree out of the house.