Peace Lilies are pretty easy to take care of, just put them in a shallow pan of water. Then remember to refill it sometime. The leaves will go to drooping when it needs water, just remember the base of the plant doesn't like to stay wet and will start to get mushy if wet from the top all the time.
Mine I put in a shallow pan of water and stick it outside all summer with just and occasional refill of the pan to get it thru the summer. I do bring them inside during the cold weather and I just got to remember they are around and check on them sometimes.
I think that is the only way to truly kill a peace lily without actually drowning it in water.
Have you ever seen the beta fish
in a vase with a plant coming out the top that is a peace lily. The only part of the plant in the water is the roots not even any dirt. That is basically what the pan under the plant pot does it keeps the roots wet and not the stems of the plant.