Tips for taking care of peace lilies include not overwatering them and providing them with adequate drainage. Peace lilies also require a significant amount of shade in order to thrive.
Overwatering is the biggest mistake that most people make with peace lilies. They are vulnerable to root rot, which can be lethal, so the soil should be allowed to dry out between watering times. Because peace lilies are drought resistant, it's safer to err on the side of caution rather than to overwater them. Checking peace lilies once per week to see if the soil is dry is recommended rather than automatically watering them on a given schedule. Some people wait until the leaves begin to droop before watering them.
Peace lilies also need good drainage in order to protect them from developing root rot, and they should be repotted into a slightly larger container if they show signs of being overcrowded. Signs that it's time to repot include roots growing out of the bottom of the pot, deformed leaf growth, and needing to be watered more than once per week.
Peace lilies should also be wiped down with a clean, damp cloth or sprayed with a mister to remove dust. Brown or yellowing leaves may be an indication that the plant is receiving too much direct sunlight. A good spot for peace lilies is 5 to 7 feet away from a window with a southern or western exposure.