Place by a well-lit window, so that it can receive the proper amount of sunlight. East-facing windows are best so that they can catch the morning’s glow and bask in the afternoon’s shade. Make sure that no part of your plant touches the windowpane, as this may harm the poinsettia.
You should water your poinsettia whenever you feel the soil is dry or you see that some of the leaves are wilting. The key is to let the water drain out the bottom, and make sure that your poinsettia is not sitting in water. If the area you are keeping your poinsettia intends to be dry, you may find yourself watering it daily.