Palms create a lush tropical atmosphere indoors.  Unlike some houseplants, palms put out new growth during the winter.  Every three or four months give them slow-release houseplant food, following manufacturer's directions.  When they near the maximum size you want, feed just once a year in spring.  The potential giants (fishtail and fan palms), plus the wide spreaders (such as Howea sp.), will need less per feeding than the shorter palms (parlor and bamboo).

Palms like plenty of moisture, but be sure to use a porous soil, and don't let pots stand in water.