There are a few easy ways to prevent your tree from going up in flames. Begin by choosing one that is still fresh, and water it daily to keep it from drying out. Use high-quality, flame-retardant string lights, and check to make sure that the cord and plug are in good condition and without any fraying wires or cracks. Position your tree a safe distance away from heat sources, such as fireplaces or radiators. And don’t forget to test your smoke detector—which you should be doing regularly anyway!