You must care for a potted palm by making sure it has plenty of water and sunshine for it to grow. You must apply sod to the soil once a year and trim the dead leaves off the palm to promote new leaf growth.
Make sure they get light from a window, skylight, etc. Try to keep some moisture in the air. If you run the AC all day, put a humidifier near it. Keeping them together will help them with humidity as well. Water them daily in the summer, but only once every 2-3 days in winter.