The peace lily is an indoor plant that's almost impossible to kill. This plant only requires indirect sun and a good watering every two to three weeks. If you ever see your Peace Lily start to droop or sag, water it. When you see it again in an hour or so, it will be back to normal.
Peace lilies do especially well in rooms with more than one window. Conveniently for frequent travelers, they can be left for extended periods of time while you are away on vacation.